From 1e068abe13bfa9da329a73cb0dabb0fc7f91f5cf Mon Sep 17 00:00:00 2001
From: Fedor Isakov <fisakov@gmail.com>
Date: Wed, 6 Nov 2019 20:41:38 +0100
Subject: [PATCH] Repackage typechecking tests to separate module.

All test data (code) to be contained in j.m.blExt.test module.
The samples are to be kept separately with generation on to demonstrate fewer false negatives
of the new typechecker.
---
 samples/mpscore/build.xml                     |  124 +-
 .../jetbrains.mps.baseLanguageExt.test.msd    |   15 +
 ...ps.baseLanguageExt.test.code.features.mps} | 1112 +++--
 ...mps.baseLanguageExt.test.code.generics.mps | 3927 +++++++++++++++++
 ...mps.baseLanguageExt.test.code.staging.mps} |  430 +-
 ...mps.baseLanguageExt.test.code.thinlet.mps} |    2 +-
 ...tbrains.mps.baseLanguageExt.test.dummy.mps |    8 +
 ...s.baseLanguageExt.test.features@tests.mps} |   51 +-
 ...s.baseLanguageExt.test.generics@tests.mps} |  201 +-
 ...aseLanguageExt.test.incremental@tests.mps} |    2 +-
 ...ps.baseLanguageExt.test.thinlet@tests.mps} |    8 +-
 .../models/samples.mpscore.build.mps          |   15 +
 .../models/bounds.bad@tests.mps               |  308 --
 .../models/bounds@tests.mps                   |  118 +-
 .../models/helloWorld@tests.mps               |   64 +
 .../models/simpleGenerics@tests.mps           |  275 --
 ...ecking.samples.baseLanguage.bounds.bad.mps | 1295 +-----
 ...pechecking.samples.baseLanguage.bounds.mps | 1001 +----
 ...cking.samples.baseLanguage.hugeSample.mps} |    2 +-
 ...ng.samples.baseLanguage.simpleGenerics.mps |  507 ---
 ...ypechecking.samples.baseLanguage.slice.mps | 1161 -----
 .../typechecking.samples.baseLanguage.msd     |    2 +
 22 files changed, 5532 insertions(+), 5096 deletions(-)
 rename samples/mpscore/solutions/{typechecking.samples.baseLanguage/models/features.mps => jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.features.mps} (93%)
 create mode 100644 samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.generics.mps
 rename samples/mpscore/solutions/{typechecking.samples.baseLanguage/models/staging.mps => jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.staging.mps} (67%)
 rename samples/mpscore/solutions/{typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.codeAnal.mps => jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.thinlet.mps} (99%)
 create mode 100644 samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.dummy.mps
 rename samples/mpscore/solutions/{typechecking.samples.baseLanguage/models/features@tests.mps => jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.features@tests.mps} (92%)
 rename samples/mpscore/solutions/{typechecking.samples.baseLanguage/models/slice@tests.mps => jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.generics@tests.mps} (62%)
 rename samples/mpscore/solutions/{typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.incrementalBL@tests.mps => jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.incremental@tests.mps} (99%)
 rename samples/mpscore/solutions/{typechecking.samples.baseLanguage/models/codeAnal@tests.mps => jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.thinlet@tests.mps} (98%)
 delete mode 100644 samples/mpscore/solutions/typechecking.samples.baseLanguage/models/bounds.bad@tests.mps
 delete mode 100644 samples/mpscore/solutions/typechecking.samples.baseLanguage/models/simpleGenerics@tests.mps
 rename samples/mpscore/solutions/typechecking.samples.baseLanguage/models/{testHuge.mps => typechecking.samples.baseLanguage.hugeSample.mps} (99%)
 delete mode 100644 samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.simpleGenerics.mps
 delete mode 100644 samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.slice.mps

diff --git a/samples/mpscore/build.xml b/samples/mpscore/build.xml
index d77a39bc..f9d99b5d 100644
--- a/samples/mpscore/build.xml
+++ b/samples/mpscore/build.xml
@@ -129,6 +129,7 @@
           <module ref="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" kind="rt" />
           <module ref="4c6a28d1-2c60-478d-b36e-db9b3cbb21fb(closures.runtime)" kind="rt" />
           <module ref="9b80526e-f0bf-4992-bdf5-cee39c1833f3(collections.runtime)" kind="rt" />
+          <module ref="a3e4657f-a76c-45bb-bbda-c764596ecc65(jetbrains.mps.baseLanguage.logging.runtime)" kind="rt" />
           <module ref="52b81ac7-93fd-4e9e-b972-4995882da6d4(jetbrains.mps.baseLanguage.references.runtime)" kind="rt" />
           <module ref="2d3c70e9-aab2-4870-8d8d-6036800e4103(jetbrains.mps.kernel)" kind="rt" />
           <module ref="d936855b-48da-4812-a8a0-2bfddd633ac5(jetbrains.mps.lang.behavior.api)" kind="rt" />
@@ -143,6 +144,8 @@
           <module ref="0fda14cc-a416-4c81-869a-2175d8b3325d(jetbrains.mps.baseLanguageExt)" kind="cl" />
           <module ref="df345b11-b8c7-4213-ac66-48d2a9b75d88(jetbrains.mps.baseLanguageInternal)" kind="cl" />
           <module ref="6998f568-f0e9-473b-b4a8-9efb6499fc8d(jetbrains.mps.coderules.typechecking)" kind="cl" />
+          <module ref="c9670c16-a215-41fb-8784-04b14329799d(jetbrains.mps.coderules.typechecking.test)" kind="cl" />
+          <module ref="7a5dda62-9140-4668-ab76-d5ed1746f2b2(jetbrains.mps.lang.typesystem)" kind="cl" />
           <module ref="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" kind="cl" />
           <module ref="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" kind="cl" />
           <module ref="b189d6c6-9397-4d64-88af-1ac73760a4f5(jetbrains.mps.logic.test)" kind="cl" />
@@ -153,12 +156,17 @@
           <language id="l:443f4c36-fcf5-4eb6-9500-8d06ed259e3e:jetbrains.mps.baseLanguage.classifiers" />
           <language id="l:fd392034-7849-419d-9071-12563d152375:jetbrains.mps.baseLanguage.closures" />
           <language id="l:83888646-71ce-4f1c-9c53-c54016f6ad4f:jetbrains.mps.baseLanguage.collections" />
+          <language id="l:f2801650-65d5-424e-bb1b-463a8781b786:jetbrains.mps.baseLanguage.javadoc" />
+          <language id="l:760a0a8c-eabb-4521-8bfd-65db761a9ba3:jetbrains.mps.baseLanguage.logging" />
           <language id="l:f61473f9-130f-42f6-b98d-6c438812c2f6:jetbrains.mps.baseLanguage.unitTest" />
+          <language id="l:0fda14cc-a416-4c81-869a-2175d8b3325d:jetbrains.mps.baseLanguageExt" />
           <language id="l:df345b11-b8c7-4213-ac66-48d2a9b75d88:jetbrains.mps.baseLanguageInternal" />
           <language id="l:63650c59-16c8-498a-99c8-005c7ee9515d:jetbrains.mps.lang.access" />
+          <language id="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" />
           <language id="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" />
           <language id="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" />
           <language id="l:8585453e-6bfb-4d80-98de-b16074f1d86c:jetbrains.mps.lang.test" />
+          <language id="l:c7fb639f-be78-4307-89b0-b5959c3fa8c8:jetbrains.mps.lang.text" />
           <language id="l:35320f26-77cb-4c55-be9f-a97a27770af1:jetbrains.mps.logic" />
         </uses>
         <classpath>
@@ -196,7 +204,6 @@
           <module ref="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" kind="rt" />
           <module ref="4c6a28d1-2c60-478d-b36e-db9b3cbb21fb(closures.runtime)" kind="rt" />
           <module ref="9b80526e-f0bf-4992-bdf5-cee39c1833f3(collections.runtime)" kind="rt" />
-          <module ref="a3e4657f-a76c-45bb-bbda-c764596ecc65(jetbrains.mps.baseLanguage.logging.runtime)" kind="rt" />
           <module ref="52b81ac7-93fd-4e9e-b972-4995882da6d4(jetbrains.mps.baseLanguage.references.runtime)" kind="rt" />
           <module ref="2d3c70e9-aab2-4870-8d8d-6036800e4103(jetbrains.mps.kernel)" kind="rt" />
           <module ref="d936855b-48da-4812-a8a0-2bfddd633ac5(jetbrains.mps.lang.behavior.api)" kind="rt" />
@@ -209,6 +216,7 @@
           <module ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" kind="cl" />
           <module ref="f3061a53-9226-4cc5-a443-f952ceaf5816(jetbrains.mps.baseLanguage)" kind="cl" />
           <module ref="0fda14cc-a416-4c81-869a-2175d8b3325d(jetbrains.mps.baseLanguageExt)" kind="cl" />
+          <module ref="e44e7802-2e40-482b-9b1c-6d42660a6a11(jetbrains.mps.baseLanguageExt.test)" kind="cl" />
           <module ref="6998f568-f0e9-473b-b4a8-9efb6499fc8d(jetbrains.mps.coderules.typechecking)" kind="cl" />
           <module ref="c9670c16-a215-41fb-8784-04b14329799d(jetbrains.mps.coderules.typechecking.test)" kind="cl" />
           <module ref="c4803b19-6d89-4a3b-bf82-390769514add(jetbrains.mps.lang.coderules)" kind="cl" />
@@ -217,20 +225,15 @@
         </dependencies>
         <uses>
           <language id="l:f3061a53-9226-4cc5-a443-f952ceaf5816:jetbrains.mps.baseLanguage" />
-          <language id="l:443f4c36-fcf5-4eb6-9500-8d06ed259e3e:jetbrains.mps.baseLanguage.classifiers" />
           <language id="l:fd392034-7849-419d-9071-12563d152375:jetbrains.mps.baseLanguage.closures" />
           <language id="l:83888646-71ce-4f1c-9c53-c54016f6ad4f:jetbrains.mps.baseLanguage.collections" />
-          <language id="l:f2801650-65d5-424e-bb1b-463a8781b786:jetbrains.mps.baseLanguage.javadoc" />
-          <language id="l:760a0a8c-eabb-4521-8bfd-65db761a9ba3:jetbrains.mps.baseLanguage.logging" />
           <language id="l:f61473f9-130f-42f6-b98d-6c438812c2f6:jetbrains.mps.baseLanguage.unitTest" />
           <language id="l:0fda14cc-a416-4c81-869a-2175d8b3325d:jetbrains.mps.baseLanguageExt" />
           <language id="l:63650c59-16c8-498a-99c8-005c7ee9515d:jetbrains.mps.lang.access" />
-          <language id="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" />
           <language id="l:28f9e497-3b42-4291-aeba-0a1039153ab1:jetbrains.mps.lang.plugin" />
-          <language id="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" />
           <language id="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" />
           <language id="l:8585453e-6bfb-4d80-98de-b16074f1d86c:jetbrains.mps.lang.test" />
-          <language id="l:c7fb639f-be78-4307-89b0-b5959c3fa8c8:jetbrains.mps.lang.text" />
+          <language id="l:0b80a2e8-f9f1-47b3-823f-56eb115bca42:jetbrains.mps.typechecking.annotation" />
         </uses>
         <classpath>
           <entry path="." />
@@ -272,7 +275,7 @@
     <delete dir="${build.layout}" />
   </target>
   
-  <target name="compileJava" depends="java.compile.jetbrains.mps.baseLanguageExt, java.compile.jetbrains.mps.baseLanguageExt.test, java.compile.typechecking.samples.baseLanguage" />
+  <target name="compileJava" depends="java.compile.jetbrains.mps.baseLanguageExt, java.compile.java.modules.cycle.1, java.compile.jetbrains.mps.baseLanguageExt.test, java.compile.typechecking.samples.baseLanguage" />
   
   <target name="processResources" />
   
@@ -493,7 +496,96 @@
     </javac>
   </target>
   
-  <target name="java.compile.jetbrains.mps.baseLanguageExt.test" depends="java.compile.jetbrains.mps.baseLanguageExt, java.compile.typechecking.samples.baseLanguage, fetchDependencies">
+  <target name="java.compile.java.modules.cycle.1" depends="java.compile.jetbrains.mps.baseLanguageExt, fetchDependencies">
+    <mkdir dir="${build.tmp}/java.modules.cycle.1" />
+    <javac destdir="${build.tmp}/java.modules.cycle.1" fork="true" encoding="utf8" nowarn="true" includeantruntime="false">
+      <compilerarg value="-Xlint:none" />
+      <src>
+        <path location="${mps.macro.mpscore_home}/solutions/jetbrains.mps.baseLanguageExt.test/source_gen" />
+        <pathelement path="${mps.macro.mpscore_home}/solutions/jetbrains.mps.baseLanguageExt.test/test_gen/" />
+        <path location="${mps.macro.mpscore_home}/solutions/typechecking.samples.baseLanguage/source_gen" />
+        <pathelement path="${mps.macro.mpscore_home}/solutions/typechecking.samples.baseLanguage/test_gen/" />
+      </src>
+      <classpath>
+        <fileset file="${artifacts.mps}/lib/mps-core.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-platform.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-annotations.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-openapi.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-logging.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-closures.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-collections.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-tuples.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-references.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-behavior-api.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-behavior-runtime.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-messaging.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-boot-util.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-context.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-constraints-runtime.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-problem.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-feedback-api.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-editor.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-editor-api.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-editor-runtime.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-generator.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-persistence.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-environment.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-project-check.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-textgen.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-test.jar" />
+        <fileset file="${artifacts.mps}/lib/ant/lib/ant.jar" />
+        <fileset file="${artifacts.mps}/lib/hamcrest-core-1.3.jar" />
+        <fileset file="${artifacts.mps}/lib/junit-4.12.jar" />
+        <fileset dir="${artifacts.mps}/lib" includes="*.jar" />
+        <fileset file="${artifacts.mps}/lib/annotations.jar" />
+        <fileset file="${artifacts.mps}/lib/log4j.jar" />
+        <fileset file="${artifacts.mps}/lib/jdom.jar" />
+        <fileset file="${artifacts.mps}/lib/trove4j.jar" />
+        <fileset file="${artifacts.mps}/lib/ecj-4.10.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.classifiers.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.closures.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.collections.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.logging.runtime.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.scopes.jar" />
+        <fileset file="${artifacts.mps}/plugins/mps-testing/languages/baseLanguage/jetbrains.mps.baseLanguage.unitTest.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguageInternal.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.coderules.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.coderules.typechecking.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.coderules.typechecking.test.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.lang.coderules.runtime.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.lang.coderules.template.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.core.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.modelapi.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.smodel.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.structure.jar" />
+        <fileset file="${artifacts.mps}/plugins/mps-testing/languages/languageDesign/jetbrains.mps.lang.test.jar" />
+        <fileset file="${artifacts.mps}/plugins/mps-testing/languages/languageDesign/jetbrains.mps.lang.test.matcher.jar" />
+        <fileset file="${artifacts.mps}/plugins/mps-testing/languages/languageDesign/jetbrains.mps.lang.test.runtime.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.traceable.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.lang.typechecking.runtime.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.typesystem.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.logic.runtime.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.logic.test.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.reporting.runtime.jar" />
+        <fileset dir="${artifacts.coderules}/deploy/lib" includes="reactive-streams-1.0.0.final.jar" />
+        <fileset dir="${artifacts.coderules}/deploy/lib" includes="rxjava-2.1.1.jar" />
+        <fileset dir="${artifacts.coderules}/deploy/lib" includes="rxjava2-swing-0.2.1.jar" />
+        <fileset dir="${artifacts.coderules}/deploy/lib" includes="collection-0.7.jar" />
+        <fileset dir="${artifacts.coderules}/deploy/lib" includes="trove4j-3.0.3.jar" />
+        <fileset dir="${artifacts.coderules}/deploy/lib" includes="conreactor-core-0.9.14.jar" />
+        <fileset dir="${artifacts.coderules}/deploy/lib" includes="mockito-core-2.0.3-beta.jar" />
+        <fileset dir="${artifacts.coderules}/deploy/lib" includes="objenesis-2.1.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.lang.coderules.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.descriptor.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.scopes.runtime.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.logic.jar" />
+        <pathelement path="${build.tmp}/java/out/jetbrains.mps.baseLanguageExt" />
+      </classpath>
+    </javac>
+  </target>
+  
+  <target name="java.compile.jetbrains.mps.baseLanguageExt.test" depends="java.compile.jetbrains.mps.baseLanguageExt, java.compile.java.modules.cycle.1, fetchDependencies">
     <mkdir dir="${mps.macro.mpscore_home}/solutions/jetbrains.mps.baseLanguageExt.test/source_gen" />
     <mkdir dir="${build.tmp}/java/out/jetbrains.mps.baseLanguageExt.test" />
     <javac destdir="${build.tmp}/java/out/jetbrains.mps.baseLanguageExt.test" fork="true" encoding="utf8" includeantruntime="false" debug="true">
@@ -530,7 +622,6 @@
         <fileset file="${artifacts.mps}/lib/mps-textgen.jar" />
         <pathelement path="${build.tmp}/java/out/jetbrains.mps.baseLanguageExt" />
         <fileset file="${artifacts.mps}/lib/mps-test.jar" />
-        <pathelement path="${build.tmp}/java/out/typechecking.samples.baseLanguage" />
         <fileset file="${artifacts.mps}/lib/ant/lib/ant.jar" />
         <fileset file="${artifacts.mps}/lib/hamcrest-core-1.3.jar" />
         <fileset file="${artifacts.mps}/lib/junit-4.12.jar" />
@@ -542,19 +633,27 @@
         <fileset file="${artifacts.mps}/lib/ecj-4.10.jar" />
         <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.jar" />
         <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.classifiers.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.closures.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.collections.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.logging.runtime.jar" />
         <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.scopes.jar" />
         <fileset file="${artifacts.mps}/plugins/mps-testing/languages/baseLanguage/jetbrains.mps.baseLanguage.unitTest.jar" />
         <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguageInternal.jar" />
         <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.coderules.jar" />
         <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.coderules.typechecking.jar" />
+        <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.coderules.typechecking.test.jar" />
         <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.lang.coderules.runtime.jar" />
         <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.lang.coderules.template.jar" />
         <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.core.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.modelapi.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.smodel.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.structure.jar" />
         <fileset file="${artifacts.mps}/plugins/mps-testing/languages/languageDesign/jetbrains.mps.lang.test.jar" />
         <fileset file="${artifacts.mps}/plugins/mps-testing/languages/languageDesign/jetbrains.mps.lang.test.matcher.jar" />
         <fileset file="${artifacts.mps}/plugins/mps-testing/languages/languageDesign/jetbrains.mps.lang.test.runtime.jar" />
         <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.traceable.jar" />
         <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.lang.typechecking.runtime.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.typesystem.jar" />
         <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.logic.runtime.jar" />
         <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.logic.test.jar" />
         <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.reporting.runtime.jar" />
@@ -566,11 +665,12 @@
         <fileset dir="${artifacts.coderules}/deploy/lib" includes="conreactor-core-0.9.14.jar" />
         <fileset dir="${artifacts.coderules}/deploy/lib" includes="mockito-core-2.0.3-beta.jar" />
         <fileset dir="${artifacts.coderules}/deploy/lib" includes="objenesis-2.1.jar" />
+        <pathelement path="${build.tmp}/java.modules.cycle.1" />
       </classpath>
     </javac>
   </target>
   
-  <target name="java.compile.typechecking.samples.baseLanguage" depends="java.compile.jetbrains.mps.baseLanguageExt, fetchDependencies">
+  <target name="java.compile.typechecking.samples.baseLanguage" depends="java.compile.jetbrains.mps.baseLanguageExt, java.compile.java.modules.cycle.1, fetchDependencies">
     <mkdir dir="${mps.macro.mpscore_home}/solutions/typechecking.samples.baseLanguage/source_gen" />
     <mkdir dir="${build.tmp}/java/out/typechecking.samples.baseLanguage" />
     <javac destdir="${build.tmp}/java/out/typechecking.samples.baseLanguage" fork="true" encoding="utf8" includeantruntime="false" debug="true">
@@ -620,7 +720,6 @@
         <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.classifiers.jar" />
         <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.closures.jar" />
         <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.collections.jar" />
-        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.logging.runtime.jar" />
         <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.scopes.jar" />
         <fileset file="${artifacts.mps}/plugins/mps-testing/languages/baseLanguage/jetbrains.mps.baseLanguage.unitTest.jar" />
         <fileset file="${artifacts.coderules}/deploy/jetbrains.mps.coderules.jar" />
@@ -650,6 +749,7 @@
         <fileset dir="${artifacts.coderules}/deploy/lib" includes="collection-0.7.jar" />
         <fileset dir="${artifacts.coderules}/deploy/lib" includes="trove4j-3.0.3.jar" />
         <fileset dir="${artifacts.coderules}/deploy/lib" includes="conreactor-core-0.9.14.jar" />
+        <pathelement path="${build.tmp}/java.modules.cycle.1" />
       </classpath>
     </javac>
   </target>
diff --git a/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/jetbrains.mps.baseLanguageExt.test.msd b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/jetbrains.mps.baseLanguageExt.test.msd
index d0f73a3c..0f167fee 100644
--- a/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/jetbrains.mps.baseLanguageExt.test.msd
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/jetbrains.mps.baseLanguageExt.test.msd
@@ -17,13 +17,18 @@
     <dependency reexport="false">3ddddf69-9ff0-426b-9365-51ae7356fb82(typechecking.samples.baseLanguage)</dependency>
     <dependency reexport="false">6998f568-f0e9-473b-b4a8-9efb6499fc8d(jetbrains.mps.coderules.typechecking)</dependency>
     <dependency reexport="false">f3061a53-9226-4cc5-a443-f952ceaf5816(jetbrains.mps.baseLanguage)</dependency>
+    <dependency reexport="false">c9670c16-a215-41fb-8784-04b14329799d(jetbrains.mps.coderules.typechecking.test)</dependency>
+    <dependency reexport="false">7a5dda62-9140-4668-ab76-d5ed1746f2b2(jetbrains.mps.lang.typesystem)</dependency>
   </dependencies>
   <languageVersions>
     <language slang="l:f3061a53-9226-4cc5-a443-f952ceaf5816:jetbrains.mps.baseLanguage" version="9" />
     <language slang="l:443f4c36-fcf5-4eb6-9500-8d06ed259e3e:jetbrains.mps.baseLanguage.classifiers" version="0" />
     <language slang="l:fd392034-7849-419d-9071-12563d152375:jetbrains.mps.baseLanguage.closures" version="0" />
     <language slang="l:83888646-71ce-4f1c-9c53-c54016f6ad4f:jetbrains.mps.baseLanguage.collections" version="1" />
+    <language slang="l:f2801650-65d5-424e-bb1b-463a8781b786:jetbrains.mps.baseLanguage.javadoc" version="2" />
+    <language slang="l:760a0a8c-eabb-4521-8bfd-65db761a9ba3:jetbrains.mps.baseLanguage.logging" version="0" />
     <language slang="l:f61473f9-130f-42f6-b98d-6c438812c2f6:jetbrains.mps.baseLanguage.unitTest" version="1" />
+    <language slang="l:0fda14cc-a416-4c81-869a-2175d8b3325d:jetbrains.mps.baseLanguageExt" version="0" />
     <language slang="l:df345b11-b8c7-4213-ac66-48d2a9b75d88:jetbrains.mps.baseLanguageInternal" version="0" />
     <language slang="l:63650c59-16c8-498a-99c8-005c7ee9515d:jetbrains.mps.lang.access" version="0" />
     <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
@@ -31,8 +36,10 @@
     <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="3" />
     <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="17" />
     <language slang="l:8585453e-6bfb-4d80-98de-b16074f1d86c:jetbrains.mps.lang.test" version="5" />
+    <language slang="l:c7fb639f-be78-4307-89b0-b5959c3fa8c8:jetbrains.mps.lang.text" version="0" />
     <language slang="l:9ded098b-ad6a-4657-bfd9-48636cfe8bc3:jetbrains.mps.lang.traceable" version="0" />
     <language slang="l:35320f26-77cb-4c55-be9f-a97a27770af1:jetbrains.mps.logic" version="4" />
+    <language slang="l:0b80a2e8-f9f1-47b3-823f-56eb115bca42:jetbrains.mps.typechecking.annotation" version="0" />
   </languageVersions>
   <dependencyVersions>
     <module reference="3f233e7f-b8a6-46d2-a57f-795d56775243(Annotations)" version="0" />
@@ -40,19 +47,27 @@
     <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
     <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
     <module reference="f3061a53-9226-4cc5-a443-f952ceaf5816(jetbrains.mps.baseLanguage)" version="0" />
+    <module reference="fd392034-7849-419d-9071-12563d152375(jetbrains.mps.baseLanguage.closures)" version="0" />
+    <module reference="83888646-71ce-4f1c-9c53-c54016f6ad4f(jetbrains.mps.baseLanguage.collections)" version="0" />
     <module reference="e39e4a59-8cb6-498e-860e-8fa8361c0d90(jetbrains.mps.baseLanguage.scopes)" version="0" />
     <module reference="0fda14cc-a416-4c81-869a-2175d8b3325d(jetbrains.mps.baseLanguageExt)" version="0" />
     <module reference="e44e7802-2e40-482b-9b1c-6d42660a6a11(jetbrains.mps.baseLanguageExt.test)" version="0" />
     <module reference="df345b11-b8c7-4213-ac66-48d2a9b75d88(jetbrains.mps.baseLanguageInternal)" version="0" />
     <module reference="f97d84b2-8bad-4fdd-8ede-da17b3eacf4c(jetbrains.mps.coderules)" version="0" />
     <module reference="6998f568-f0e9-473b-b4a8-9efb6499fc8d(jetbrains.mps.coderules.typechecking)" version="0" />
+    <module reference="c9670c16-a215-41fb-8784-04b14329799d(jetbrains.mps.coderules.typechecking.test)" version="0" />
     <module reference="2d3c70e9-aab2-4870-8d8d-6036800e4103(jetbrains.mps.kernel)" version="0" />
+    <module reference="d936855b-48da-4812-a8a0-2bfddd633ac5(jetbrains.mps.lang.behavior.api)" version="0" />
     <module reference="26e8f4ce-2a35-4f44-8065-e5ba154b18e9(jetbrains.mps.lang.coderules.runtime)" version="0" />
     <module reference="ff6372a2-2f45-4ec3-952b-02581666015f(jetbrains.mps.lang.coderules.template)" version="0" />
     <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
     <module reference="9e98f4e2-decf-4e97-bf80-9109e8b759aa(jetbrains.mps.lang.feedback.context)" version="0" />
+    <module reference="446c26eb-2b7b-4bf0-9b35-f83fa582753e(jetbrains.mps.lang.modelapi)" version="0" />
+    <module reference="7866978e-a0f0-4cc7-81bc-4d213d9375e1(jetbrains.mps.lang.smodel)" version="1" />
+    <module reference="c72da2b9-7cce-4447-8389-f407dc1158b7(jetbrains.mps.lang.structure)" version="0" />
     <module reference="9ded098b-ad6a-4657-bfd9-48636cfe8bc3(jetbrains.mps.lang.traceable)" version="0" />
     <module reference="f486b8aa-5b2d-4ec0-8ef5-8f45d773fb84(jetbrains.mps.lang.typechecking.runtime)" version="0" />
+    <module reference="7a5dda62-9140-4668-ab76-d5ed1746f2b2(jetbrains.mps.lang.typesystem)" version="0" />
     <module reference="bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)" version="0" />
     <module reference="a5478664-6b44-4c62-a9f7-434f8aa57eee(jetbrains.mps.logic.runtime)" version="0" />
     <module reference="b189d6c6-9397-4d64-88af-1ac73760a4f5(jetbrains.mps.logic.test)" version="0" />
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/features.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.features.mps
similarity index 93%
rename from samples/mpscore/solutions/typechecking.samples.baseLanguage/models/features.mps
rename to samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.features.mps
index b734d6e7..5bd6eb7b 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/features.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.features.mps
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:0a51f978-f7e7-4ce4-89ac-69fc1d6b1a8d(typechecking.samples.baseLanguage.features)" doNotGenerate="true">
+<model ref="r:24bdfe1a-5c8f-4e02-bf75-2d22a609ac69(jetbrains.mps.baseLanguageExt.test.code.features)" doNotGenerate="true">
   <persistence version="9" />
   <languages>
     <use id="0b80a2e8-f9f1-47b3-823f-56eb115bca42" name="jetbrains.mps.typechecking.annotation" version="0" />
@@ -34,6 +34,12 @@
         <child id="1173175577737" name="index" index="AHEQo" />
         <child id="1173175590490" name="array" index="AHHXb" />
       </concept>
+      <concept id="1188207840427" name="jetbrains.mps.baseLanguage.structure.AnnotationInstance" flags="nn" index="2AHcQZ">
+        <reference id="1188208074048" name="annotation" index="2AI5Lk" />
+      </concept>
+      <concept id="1188208481402" name="jetbrains.mps.baseLanguage.structure.HasAnnotation" flags="ng" index="2AJDlI">
+        <child id="1188208488637" name="annotation" index="2AJF6D" />
+      </concept>
       <concept id="1188220165133" name="jetbrains.mps.baseLanguage.structure.ArrayLiteral" flags="nn" index="2BsdOp">
         <child id="1188220173759" name="item" index="2BsfMF" />
       </concept>
@@ -79,13 +85,17 @@
         <child id="1070534934092" name="expression" index="10QFUP" />
       </concept>
       <concept id="1068390468200" name="jetbrains.mps.baseLanguage.structure.FieldDeclaration" flags="ig" index="312cEg" />
-      <concept id="1068390468198" name="jetbrains.mps.baseLanguage.structure.ClassConcept" flags="ig" index="312cEu" />
+      <concept id="1068390468198" name="jetbrains.mps.baseLanguage.structure.ClassConcept" flags="ig" index="312cEu">
+        <child id="1095933932569" name="implementedInterface" index="EKbjA" />
+        <child id="1165602531693" name="superclass" index="1zkMxy" />
+      </concept>
       <concept id="1068431474542" name="jetbrains.mps.baseLanguage.structure.VariableDeclaration" flags="ng" index="33uBYm">
         <property id="1176718929932" name="isFinal" index="3TUv4t" />
         <child id="1068431790190" name="initializer" index="33vP2m" />
       </concept>
       <concept id="1109279763828" name="jetbrains.mps.baseLanguage.structure.TypeVariableDeclaration" flags="ng" index="16euLQ">
         <child id="1214996921760" name="bound" index="3ztrMU" />
+        <child id="1215091156086" name="auxBounds" index="3D4UlG" />
       </concept>
       <concept id="1109279851642" name="jetbrains.mps.baseLanguage.structure.GenericDeclaration" flags="ng" index="16eOlS">
         <child id="1109279881614" name="typeVariableDeclaration" index="16eVyc" />
@@ -116,6 +126,7 @@
         <child id="1068580123135" name="body" index="3clF47" />
       </concept>
       <concept id="1068580123165" name="jetbrains.mps.baseLanguage.structure.InstanceMethodDeclaration" flags="ig" index="3clFb_" />
+      <concept id="1068580123152" name="jetbrains.mps.baseLanguage.structure.EqualsExpression" flags="nn" index="3clFbC" />
       <concept id="1068580123155" name="jetbrains.mps.baseLanguage.structure.ExpressionStatement" flags="nn" index="3clFbF">
         <child id="1068580123156" name="expression" index="3clFbG" />
       </concept>
@@ -182,6 +193,11 @@
       <concept id="1178549954367" name="jetbrains.mps.baseLanguage.structure.IVisible" flags="ng" index="1B3ioH">
         <child id="1178549979242" name="visibility" index="1B3o_S" />
       </concept>
+      <concept id="1163668896201" name="jetbrains.mps.baseLanguage.structure.TernaryOperatorExpression" flags="nn" index="3K4zz7">
+        <child id="1163668914799" name="condition" index="3K4Cdx" />
+        <child id="1163668922816" name="ifTrue" index="3K4E3e" />
+        <child id="1163668934364" name="ifFalse" index="3K4GZi" />
+      </concept>
       <concept id="1208890769693" name="jetbrains.mps.baseLanguage.structure.ArrayLengthOperation" flags="nn" index="1Rwk04" />
       <concept id="6329021646629104954" name="jetbrains.mps.baseLanguage.structure.SingleLineComment" flags="nn" index="3SKdUt">
         <child id="1350122676458893092" name="text" index="3ndbpf" />
@@ -8115,424 +8131,6 @@
     <node concept="2tJIrI" id="7AyqXCdDMUK" role="jymVt" />
     <node concept="3Tm1VV" id="5XJPBczwaPh" role="1B3o_S" />
   </node>
-  <node concept="312cEu" id="6EY0p2x_6$D">
-    <property role="TrG5h" value="FUBAR" />
-    <node concept="2tJIrI" id="6EY0p2x_6$F" role="jymVt" />
-    <node concept="2tJIrI" id="6EY0p2x_6$H" role="jymVt" />
-    <node concept="312cEu" id="6EY0p2x_6$Z" role="jymVt">
-      <property role="2bfB8j" value="false" />
-      <property role="TrG5h" value="ExpectListOfNumber" />
-      <node concept="3Tm1VV" id="6EY0p2x_6_0" role="1B3o_S" />
-      <node concept="16euLQ" id="6EY0p2x_6_k" role="16eVyc">
-        <property role="TrG5h" value="T" />
-        <node concept="3uibUv" id="6EY0p2x_6_s" role="3ztrMU">
-          <ref role="3uigEE" to="33ny:~List" resolve="List" />
-          <node concept="3uibUv" id="6EY0p2x_6_z" role="11_B2D">
-            <ref role="3uigEE" to="wyt6:~Number" resolve="Number" />
-          </node>
-        </node>
-      </node>
-    </node>
-    <node concept="2tJIrI" id="6EY0p2x_gi4" role="jymVt" />
-    <node concept="312cEu" id="6EY0p2x_ghZ" role="jymVt">
-      <property role="2bfB8j" value="false" />
-      <property role="TrG5h" value="ExpectList" />
-      <node concept="3Tm1VV" id="6EY0p2x_gi0" role="1B3o_S" />
-      <node concept="16euLQ" id="6EY0p2x_gi1" role="16eVyc">
-        <property role="TrG5h" value="T" />
-        <node concept="3uibUv" id="6EY0p2x_gi2" role="3ztrMU">
-          <ref role="3uigEE" to="33ny:~List" resolve="List" />
-        </node>
-      </node>
-    </node>
-    <node concept="2tJIrI" id="6EY0p2x_6$O" role="jymVt" />
-    <node concept="312cEu" id="6EY0p2x_6Tu" role="jymVt">
-      <property role="2bfB8j" value="false" />
-      <property role="TrG5h" value="C" />
-      <node concept="2tJIrI" id="6EY0p2x_6Ui" role="jymVt" />
-      <node concept="3clFb_" id="6EY0p2x_6Ur" role="jymVt">
-        <property role="TrG5h" value="expectListOfNumber" />
-        <node concept="3uibUv" id="6EY0p2x_7nZ" role="3clF45">
-          <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
-        </node>
-        <node concept="3Tm1VV" id="6EY0p2x_6Uu" role="1B3o_S" />
-        <node concept="3clFbS" id="6EY0p2x_6Uv" role="3clF47">
-          <node concept="3cpWs6" id="6EY0p2x_f3_" role="3cqZAp">
-            <node concept="10Nm6u" id="6EY0p2x_7oi" role="3cqZAk" />
-          </node>
-        </node>
-        <node concept="16euLQ" id="6EY0p2x_6UC" role="16eVyc">
-          <property role="TrG5h" value="T" />
-          <node concept="3uibUv" id="6EY0p2x_6UI" role="3ztrMU">
-            <ref role="3uigEE" to="33ny:~List" resolve="List" />
-            <node concept="3uibUv" id="6EY0p2x_6UP" role="11_B2D">
-              <ref role="3uigEE" to="wyt6:~Number" resolve="Number" />
-            </node>
-          </node>
-        </node>
-      </node>
-      <node concept="2tJIrI" id="6EY0p2x_gb9" role="jymVt" />
-      <node concept="3clFb_" id="6EY0p2x_gax" role="jymVt">
-        <property role="TrG5h" value="expectList" />
-        <node concept="3uibUv" id="6EY0p2x_gay" role="3clF45">
-          <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
-        </node>
-        <node concept="3Tm1VV" id="6EY0p2x_gaz" role="1B3o_S" />
-        <node concept="3clFbS" id="6EY0p2x_ga$" role="3clF47">
-          <node concept="3cpWs6" id="6EY0p2x_ga_" role="3cqZAp">
-            <node concept="10Nm6u" id="6EY0p2x_gaA" role="3cqZAk" />
-          </node>
-        </node>
-        <node concept="16euLQ" id="6EY0p2x_gaB" role="16eVyc">
-          <property role="TrG5h" value="T" />
-          <node concept="3uibUv" id="6EY0p2x_gaC" role="3ztrMU">
-            <ref role="3uigEE" to="33ny:~List" resolve="List" />
-          </node>
-        </node>
-      </node>
-      <node concept="2tJIrI" id="6EY0p2x_7za" role="jymVt" />
-      <node concept="3clFb_" id="6EY0p2x_7yH" role="jymVt">
-        <property role="TrG5h" value="expectListOfT" />
-        <node concept="16syzq" id="6EY0p2x_7Fr" role="3clF45">
-          <ref role="16sUi3" node="6EY0p2x_7zw" resolve="T" />
-        </node>
-        <node concept="3Tm1VV" id="6EY0p2x_7yJ" role="1B3o_S" />
-        <node concept="3clFbS" id="6EY0p2x_7yK" role="3clF47">
-          <node concept="3cpWs6" id="6EY0p2x_f3U" role="3cqZAp">
-            <node concept="10Nm6u" id="6EY0p2x_7yM" role="3cqZAk" />
-          </node>
-        </node>
-        <node concept="16euLQ" id="6EY0p2x_7zw" role="16eVyc">
-          <property role="TrG5h" value="T" />
-        </node>
-        <node concept="16euLQ" id="6EY0p2x_7yN" role="16eVyc">
-          <property role="TrG5h" value="S" />
-          <node concept="3uibUv" id="6EY0p2x_7yO" role="3ztrMU">
-            <ref role="3uigEE" to="33ny:~List" resolve="List" />
-            <node concept="16syzq" id="6EY0p2x_7z_" role="11_B2D">
-              <ref role="16sUi3" node="6EY0p2x_7zw" resolve="T" />
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@@ -9396,5 +8994,679 @@
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+      <node concept="16euLQ" id="1qY0I4c33sd" role="16eVyc">
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+    <node concept="312cEu" id="1qY0I4c32dS" role="jymVt">
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+      <node concept="3Tm1VV" id="1qY0I4c325z" role="1B3o_S" />
+      <node concept="16euLQ" id="1qY0I4c32mp" role="16eVyc">
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+      <node concept="16euLQ" id="1qY0I4c33nW" role="16eVyc">
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+                <node concept="3clFbC" id="6cPUNFQMIET" role="3K4Cdx">
+                  <node concept="37vLTw" id="6cPUNFQMIEU" role="3uHU7B">
+                    <ref role="3cqZAo" node="6cPUNFQMIsq" resolve="b" />
+                  </node>
+                  <node concept="10Nm6u" id="6cPUNFQMIEV" role="3uHU7w" />
+                </node>
+                <node concept="37vLTw" id="6cPUNFQMIEW" role="3K4E3e">
+                  <ref role="3cqZAo" node="6cPUNFQMIsq" resolve="b" />
+                </node>
+                <node concept="37vLTw" id="6cPUNFQN9A7" role="3K4GZi">
+                  <ref role="3cqZAo" node="6cPUNFQMIzZ" resolve="d" />
+                </node>
+              </node>
+              <node concept="3uibUv" id="6cPUNFQMIEY" role="1tU5fm">
+                <ref role="3uigEE" node="1qY0I4c32dS" resolve="Lub.B" />
+                <node concept="3qTvmN" id="6cPUNFQMJ63" role="11_B2D" />
+                <node concept="3qTvmN" id="6cPUNFQNlvb" role="11_B2D" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3Tm1VV" id="6cPUNFQMIm5" role="1B3o_S" />
+        <node concept="3cqZAl" id="6cPUNFQMInS" role="3clF45" />
+        <node concept="37vLTG" id="6cPUNFQMIsq" role="3clF46">
+          <property role="TrG5h" value="b" />
+          <node concept="3uibUv" id="6cPUNFQMIsp" role="1tU5fm">
+            <ref role="3uigEE" node="1qY0I4c32dS" resolve="Lub.B" />
+            <node concept="3uibUv" id="6cPUNFQNip8" role="11_B2D">
+              <ref role="3uigEE" node="1RiyfbgUGV1" resolve="Lub.E" />
+              <node concept="3uibUv" id="6cPUNFQNip9" role="11_B2D">
+                <ref role="3uigEE" to="wyt6:~Double" resolve="Double" />
+              </node>
+            </node>
+            <node concept="3uibUv" id="6cPUNFQMIzc" role="11_B2D">
+              <ref role="3uigEE" to="wyt6:~Long" resolve="Long" />
+            </node>
+          </node>
+        </node>
+        <node concept="37vLTG" id="6cPUNFQMIzZ" role="3clF46">
+          <property role="TrG5h" value="d" />
+          <node concept="3uibUv" id="6cPUNFQMI_i" role="1tU5fm">
+            <ref role="3uigEE" node="1RiyfbhbL87" resolve="Lub.D" />
+            <node concept="3uibUv" id="6cPUNFQNhGZ" role="11_B2D">
+              <ref role="3uigEE" node="1qY0I4c32dS" resolve="Lub.B" />
+              <node concept="3qTvmN" id="6cPUNFQNhH0" role="11_B2D" />
+              <node concept="3uibUv" id="6cPUNFQNhH1" role="11_B2D">
+                <ref role="3uigEE" to="wyt6:~Long" resolve="Long" />
+              </node>
+            </node>
+            <node concept="3uibUv" id="6cPUNFQMIBN" role="11_B2D">
+              <ref role="3uigEE" to="wyt6:~String" resolve="String" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="2tJIrI" id="6cPUNFQMXa8" role="jymVt" />
+      <node concept="3clFb_" id="6cPUNFQMWGA" role="jymVt">
+        <property role="TrG5h" value="lubNobound" />
+        <node concept="3clFbS" id="6cPUNFQMWGB" role="3clF47">
+          <node concept="3cpWs8" id="6cPUNFQMWGC" role="3cqZAp">
+            <node concept="3cpWsn" id="6cPUNFQMWGD" role="3cpWs9">
+              <property role="TrG5h" value="res" />
+              <node concept="3K4zz7" id="6cPUNFQMWGE" role="33vP2m">
+                <node concept="3clFbC" id="6cPUNFQMWGF" role="3K4Cdx">
+                  <node concept="37vLTw" id="6cPUNFQMWGG" role="3uHU7B">
+                    <ref role="3cqZAo" node="6cPUNFQMWGO" resolve="s" />
+                  </node>
+                  <node concept="10Nm6u" id="6cPUNFQMWGH" role="3uHU7w" />
+                </node>
+                <node concept="37vLTw" id="6cPUNFQMWGI" role="3K4E3e">
+                  <ref role="3cqZAo" node="6cPUNFQMWGO" resolve="s" />
+                </node>
+                <node concept="37vLTw" id="6cPUNFQMYzc" role="3K4GZi">
+                  <ref role="3cqZAo" node="6cPUNFQMWGS" resolve="a" />
+                </node>
+              </node>
+              <node concept="1U20sH" id="6cPUNFQMYFr" role="lGtFl">
+                <property role="1U20sK" value="error" />
+              </node>
+              <node concept="3uibUv" id="6cPUNFQMZEZ" role="1tU5fm">
+                <ref role="3uigEE" to="wyt6:~String" resolve="String" />
+              </node>
+            </node>
+          </node>
+          <node concept="3cpWs8" id="6cPUNFQMYFZ" role="3cqZAp">
+            <node concept="3cpWsn" id="6cPUNFQMYG0" role="3cpWs9">
+              <property role="TrG5h" value="resObj" />
+              <node concept="3K4zz7" id="6cPUNFQMYG1" role="33vP2m">
+                <node concept="3clFbC" id="6cPUNFQMYG2" role="3K4Cdx">
+                  <node concept="37vLTw" id="6cPUNFQMYG3" role="3uHU7B">
+                    <ref role="3cqZAo" node="6cPUNFQMWGO" resolve="s" />
+                  </node>
+                  <node concept="10Nm6u" id="6cPUNFQMYG4" role="3uHU7w" />
+                </node>
+                <node concept="37vLTw" id="6cPUNFQMYG5" role="3K4E3e">
+                  <ref role="3cqZAo" node="6cPUNFQMWGO" resolve="s" />
+                </node>
+                <node concept="37vLTw" id="6cPUNFQMYG6" role="3K4GZi">
+                  <ref role="3cqZAo" node="6cPUNFQMWGS" resolve="a" />
+                </node>
+              </node>
+              <node concept="3uibUv" id="6cPUNFQMYUF" role="1tU5fm">
+                <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3Tm1VV" id="6cPUNFQMWGM" role="1B3o_S" />
+        <node concept="3cqZAl" id="6cPUNFQMWGN" role="3clF45" />
+        <node concept="37vLTG" id="6cPUNFQMWGO" role="3clF46">
+          <property role="TrG5h" value="s" />
+          <node concept="3uibUv" id="6cPUNFQMYZV" role="1tU5fm">
+            <ref role="3uigEE" to="wyt6:~Comparable" resolve="Comparable" />
+            <node concept="3uibUv" id="6cPUNFQMZnw" role="11_B2D">
+              <ref role="3uigEE" to="wyt6:~String" resolve="String" />
+            </node>
+          </node>
+        </node>
+        <node concept="37vLTG" id="6cPUNFQMWGS" role="3clF46">
+          <property role="TrG5h" value="a" />
+          <node concept="3uibUv" id="6cPUNFQMY2q" role="1tU5fm">
+            <ref role="3uigEE" node="1qY0I4c32N6" resolve="Lub.A" />
+            <node concept="3uibUv" id="6cPUNFQMY7T" role="11_B2D">
+              <ref role="3uigEE" to="wyt6:~String" resolve="String" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="2tJIrI" id="6cPUNFQMWEk" role="jymVt" />
+      <node concept="3Tm1VV" id="1RiyfbgUAP8" role="1B3o_S" />
+      <node concept="2tJIrI" id="4n0emEk3ht5" role="jymVt" />
+      <node concept="2tJIrI" id="4n0emEk3ht7" role="jymVt" />
+      <node concept="3clFb_" id="7DmawKu5cJG" role="jymVt">
+        <property role="TrG5h" value="test" />
+        <node concept="37vLTG" id="7DmawKu5cJH" role="3clF46">
+          <property role="TrG5h" value="b" />
+          <node concept="3uibUv" id="7DmawKu5cJI" role="1tU5fm">
+            <ref role="3uigEE" node="1qY0I4c32dS" resolve="Lub.B" />
+            <node concept="3qTvmN" id="7DmawKu5cJJ" role="11_B2D" />
+            <node concept="3uibUv" id="7DmawKu5cJK" role="11_B2D">
+              <ref role="3uigEE" to="wyt6:~Long" resolve="Long" />
+            </node>
+          </node>
+        </node>
+        <node concept="37vLTG" id="7DmawKu5cJL" role="3clF46">
+          <property role="TrG5h" value="e" />
+          <node concept="3uibUv" id="7DmawKu5cJM" role="1tU5fm">
+            <ref role="3uigEE" node="1RiyfbgUGV1" resolve="Lub.E" />
+            <node concept="3uibUv" id="7DmawKu5cJN" role="11_B2D">
+              <ref role="3uigEE" to="wyt6:~Double" resolve="Double" />
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbS" id="7DmawKu5cJO" role="3clF47">
+          <node concept="3clFbF" id="7DmawKu5Bag" role="3cqZAp">
+            <node concept="1rXfSq" id="7DmawKu5Bae" role="3clFbG">
+              <ref role="37wK5l" node="7DmawKu5Fwz" resolve="accept_Number" />
+              <node concept="3K4zz7" id="7DmawKu5Bu$" role="37wK5m">
+                <node concept="3clFbC" id="7DmawKu5Bu_" role="3K4Cdx">
+                  <node concept="37vLTw" id="7DmawKu5BuA" role="3uHU7B">
+                    <ref role="3cqZAo" node="7DmawKu5cJH" resolve="b" />
+                  </node>
+                  <node concept="10Nm6u" id="7DmawKu5BuB" role="3uHU7w" />
+                </node>
+                <node concept="2OqwBi" id="7DmawKu5BuC" role="3K4E3e">
+                  <node concept="37vLTw" id="7DmawKu5BuD" role="2Oq$k0">
+                    <ref role="3cqZAo" node="7DmawKu5cJH" resolve="b" />
+                  </node>
+                  <node concept="liA8E" id="7DmawKu5BuE" role="2OqNvi">
+                    <ref role="37wK5l" node="7DmawKu5dXJ" resolve="get" />
+                  </node>
+                </node>
+                <node concept="2OqwBi" id="7DmawKu5BuF" role="3K4GZi">
+                  <node concept="37vLTw" id="7DmawKu5BuG" role="2Oq$k0">
+                    <ref role="3cqZAo" node="7DmawKu5cJL" resolve="e" />
+                  </node>
+                  <node concept="liA8E" id="7DmawKu5BuH" role="2OqNvi">
+                    <ref role="37wK5l" node="7DmawKu5fPD" resolve="get" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="3clFbF" id="7DmawKu5ICE" role="3cqZAp">
+            <node concept="1rXfSq" id="7DmawKu5ICF" role="3clFbG">
+              <ref role="37wK5l" node="7DmawKu5xL8" resolve="accept_Serializable" />
+              <node concept="3K4zz7" id="7DmawKu5ICG" role="37wK5m">
+                <node concept="3clFbC" id="7DmawKu5ICH" role="3K4Cdx">
+                  <node concept="37vLTw" id="7DmawKu5ICI" role="3uHU7B">
+                    <ref role="3cqZAo" node="7DmawKu5cJH" resolve="b" />
+                  </node>
+                  <node concept="10Nm6u" id="7DmawKu5ICJ" role="3uHU7w" />
+                </node>
+                <node concept="2OqwBi" id="7DmawKu5ICK" role="3K4E3e">
+                  <node concept="37vLTw" id="7DmawKu5ICL" role="2Oq$k0">
+                    <ref role="3cqZAo" node="7DmawKu5cJH" resolve="b" />
+                  </node>
+                  <node concept="liA8E" id="7DmawKu5ICM" role="2OqNvi">
+                    <ref role="37wK5l" node="7DmawKu5dXJ" resolve="get" />
+                  </node>
+                </node>
+                <node concept="2OqwBi" id="7DmawKu5ICN" role="3K4GZi">
+                  <node concept="37vLTw" id="7DmawKu5ICO" role="2Oq$k0">
+                    <ref role="3cqZAo" node="7DmawKu5cJL" resolve="e" />
+                  </node>
+                  <node concept="liA8E" id="7DmawKu5ICP" role="2OqNvi">
+                    <ref role="37wK5l" node="7DmawKu5fPD" resolve="get" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="3clFbF" id="7DmawKu5_tZ" role="3cqZAp">
+            <node concept="1rXfSq" id="7DmawKu5_tX" role="3clFbG">
+              <ref role="37wK5l" node="7DmawKu5y_l" resolve="accept_Comparable" />
+              <node concept="3K4zz7" id="7DmawKu5_Fs" role="37wK5m">
+                <node concept="3clFbC" id="7DmawKu5_Ft" role="3K4Cdx">
+                  <node concept="37vLTw" id="7DmawKu5_Fu" role="3uHU7B">
+                    <ref role="3cqZAo" node="7DmawKu5cJH" resolve="b" />
+                  </node>
+                  <node concept="10Nm6u" id="7DmawKu5_Fv" role="3uHU7w" />
+                </node>
+                <node concept="2OqwBi" id="7DmawKu5_Fw" role="3K4E3e">
+                  <node concept="37vLTw" id="7DmawKu5_Fx" role="2Oq$k0">
+                    <ref role="3cqZAo" node="7DmawKu5cJH" resolve="b" />
+                  </node>
+                  <node concept="liA8E" id="7DmawKu5_Fy" role="2OqNvi">
+                    <ref role="37wK5l" node="7DmawKu5dXJ" resolve="get" />
+                  </node>
+                </node>
+                <node concept="2OqwBi" id="7DmawKu5_Fz" role="3K4GZi">
+                  <node concept="37vLTw" id="7DmawKu5_F$" role="2Oq$k0">
+                    <ref role="3cqZAo" node="7DmawKu5cJL" resolve="e" />
+                  </node>
+                  <node concept="liA8E" id="7DmawKu5_F_" role="2OqNvi">
+                    <ref role="37wK5l" node="7DmawKu5fPD" resolve="get" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3Tm1VV" id="7DmawKu5cJZ" role="1B3o_S" />
+        <node concept="3cqZAl" id="7DmawKu5Cu0" role="3clF45" />
+      </node>
+      <node concept="2tJIrI" id="7DmawKu5cJF" role="jymVt" />
+      <node concept="3clFb_" id="7DmawKu5xL8" role="jymVt">
+        <property role="TrG5h" value="accept_Serializable" />
+        <node concept="37vLTG" id="7DmawKu5yPJ" role="3clF46">
+          <property role="TrG5h" value="s" />
+          <node concept="3uibUv" id="7DmawKu5yXp" role="1tU5fm">
+            <ref role="3uigEE" to="guwi:~Serializable" resolve="Serializable" />
+          </node>
+        </node>
+        <node concept="3cqZAl" id="7DmawKu5xLa" role="3clF45" />
+        <node concept="3Tm1VV" id="7DmawKu5xLb" role="1B3o_S" />
+        <node concept="3clFbS" id="7DmawKu5xLc" role="3clF47" />
+      </node>
+      <node concept="2tJIrI" id="7DmawKu5H8G" role="jymVt" />
+      <node concept="3clFb_" id="7DmawKu5Fwz" role="jymVt">
+        <property role="TrG5h" value="accept_Number" />
+        <node concept="37vLTG" id="7DmawKu5Fw$" role="3clF46">
+          <property role="TrG5h" value="n" />
+          <node concept="3uibUv" id="7DmawKu5Ide" role="1tU5fm">
+            <ref role="3uigEE" to="wyt6:~Number" resolve="Number" />
+          </node>
+        </node>
+        <node concept="3cqZAl" id="7DmawKu5FwA" role="3clF45" />
+        <node concept="3Tm1VV" id="7DmawKu5FwB" role="1B3o_S" />
+        <node concept="3clFbS" id="7DmawKu5FwC" role="3clF47" />
+      </node>
+      <node concept="2tJIrI" id="7DmawKu5yHI" role="jymVt" />
+      <node concept="3clFb_" id="7DmawKu5y_l" role="jymVt">
+        <property role="TrG5h" value="accept_Comparable" />
+        <node concept="37vLTG" id="7DmawKu5zs0" role="3clF46">
+          <property role="TrG5h" value="c" />
+          <node concept="3uibUv" id="7DmawKu5zyq" role="1tU5fm">
+            <ref role="3uigEE" to="wyt6:~Comparable" resolve="Comparable" />
+            <node concept="3qTvmN" id="7DmawKu5zL0" role="11_B2D" />
+          </node>
+        </node>
+        <node concept="3cqZAl" id="7DmawKu5y_m" role="3clF45" />
+        <node concept="3Tm1VV" id="7DmawKu5y_n" role="1B3o_S" />
+        <node concept="3clFbS" id="7DmawKu5y_o" role="3clF47" />
+      </node>
+      <node concept="2tJIrI" id="7DmawKu5cI2" role="jymVt" />
+    </node>
+    <node concept="2tJIrI" id="2VOKs1Aryu1" role="jymVt" />
+    <node concept="3Tm1VV" id="2VOKs1ArylW" role="1B3o_S" />
+  </node>
 </model>
 
diff --git a/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.generics.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.generics.mps
new file mode 100644
index 00000000..f8698364
--- /dev/null
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.generics.mps
@@ -0,0 +1,3927 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<model ref="r:3be3464b-7052-4e73-b8e9-dc5802b8d5a9(jetbrains.mps.baseLanguageExt.test.code.generics)" doNotGenerate="true">
+  <persistence version="9" />
+  <languages>
+    <use id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage" version="9" />
+    <use id="0fda14cc-a416-4c81-869a-2175d8b3325d" name="jetbrains.mps.baseLanguageExt" version="0" />
+    <use id="0b80a2e8-f9f1-47b3-823f-56eb115bca42" name="jetbrains.mps.typechecking.annotation" version="0" />
+  </languages>
+  <imports>
+    <import index="33ny" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.util(JDK/)" />
+    <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" />
+    <import index="guwi" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.io(JDK/)" />
+  </imports>
+  <registry>
+    <language id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage">
+      <concept id="1215693861676" name="jetbrains.mps.baseLanguage.structure.BaseAssignmentExpression" flags="nn" index="d038R">
+        <child id="1068498886297" name="rValue" index="37vLTx" />
+        <child id="1068498886295" name="lValue" index="37vLTJ" />
+      </concept>
+      <concept id="1215695189714" name="jetbrains.mps.baseLanguage.structure.PlusAssignmentExpression" flags="nn" index="d57v9" />
+      <concept id="1202948039474" name="jetbrains.mps.baseLanguage.structure.InstanceMethodCallOperation" flags="nn" index="liA8E" />
+      <concept id="1465982738277781862" name="jetbrains.mps.baseLanguage.structure.PlaceholderMember" flags="ng" index="2tJIrI" />
+      <concept id="2820489544401957797" name="jetbrains.mps.baseLanguage.structure.DefaultClassCreator" flags="nn" index="HV5vD">
+        <reference id="2820489544401957798" name="classifier" index="HV5vE" />
+        <child id="2820489544402271667" name="typeParameter" index="HU9BZ" />
+      </concept>
+      <concept id="1197027756228" name="jetbrains.mps.baseLanguage.structure.DotExpression" flags="nn" index="2OqwBi">
+        <child id="1197027771414" name="operand" index="2Oq$k0" />
+        <child id="1197027833540" name="operation" index="2OqNvi" />
+      </concept>
+      <concept id="1197029447546" name="jetbrains.mps.baseLanguage.structure.FieldReferenceOperation" flags="nn" index="2OwXpG">
+        <reference id="1197029500499" name="fieldDeclaration" index="2Oxat5" />
+      </concept>
+      <concept id="1145552977093" name="jetbrains.mps.baseLanguage.structure.GenericNewExpression" flags="nn" index="2ShNRf">
+        <child id="1145553007750" name="creator" index="2ShVmc" />
+      </concept>
+      <concept id="1070462154015" name="jetbrains.mps.baseLanguage.structure.StaticFieldDeclaration" flags="ig" index="Wx3nA" />
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+                <ref role="3uigEE" node="1TH_SRmEWFJ" resolve="Bounds.B" />
+              </node>
+              <node concept="2OqwBi" id="1TH_SRmEWIJ" role="33vP2m">
+                <node concept="37vLTw" id="1TH_SRmEWIK" role="2Oq$k0">
+                  <ref role="3cqZAo" node="1TH_SRmEWHH" resolve="g" />
+                </node>
+                <node concept="liA8E" id="1TH_SRmEWIL" role="2OqNvi">
+                  <ref role="37wK5l" node="1TH_SRmEWGH" resolve="g3" />
+                  <node concept="2OqwBi" id="1TH_SRmEWIM" role="37wK5m">
+                    <node concept="37vLTw" id="1TH_SRmEWIN" role="2Oq$k0">
+                      <ref role="3cqZAo" node="1TH_SRmEWIW" resolve="s" />
+                    </node>
+                    <node concept="liA8E" id="1TH_SRmEWIO" role="2OqNvi">
+                      <ref role="37wK5l" node="1TH_SRmEWFV" resolve="h" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="3clFbH" id="1TH_SRmFfxx" role="3cqZAp" />
+          <node concept="3SKdUt" id="5vMXiMGUFdU" role="3cqZAp">
+            <node concept="1PaTwC" id="5vMXiMGUFdV" role="3ndbpf">
+              <node concept="3oM_SD" id="5vMXiMGUFdX" role="1PaTwD">
+                <property role="3oM_SC" value="check" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUFMI" role="1PaTwD">
+                <property role="3oM_SC" value="that" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUFQg" role="1PaTwD">
+                <property role="3oM_SC" value="incorrectly" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUG0D" role="1PaTwD">
+                <property role="3oM_SC" value="instantiated" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUG7G" role="1PaTwD">
+                <property role="3oM_SC" value="variables" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUG7M" role="1PaTwD">
+                <property role="3oM_SC" value="can" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUG7T" role="1PaTwD">
+                <property role="3oM_SC" value="still" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUGbo" role="1PaTwD">
+                <property role="3oM_SC" value="be" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUGbx" role="1PaTwD">
+                <property role="3oM_SC" value="used" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUG$G" role="1PaTwD">
+                <property role="3oM_SC" value="further" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUGCm" role="1PaTwD">
+                <property role="3oM_SC" value="and" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUGCy" role="1PaTwD">
+                <property role="3oM_SC" value="typechecked" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUGXx" role="1PaTwD">
+                <property role="3oM_SC" value="in" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUGXJ" role="1PaTwD">
+                <property role="3oM_SC" value="some" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUH1t" role="1PaTwD">
+                <property role="3oM_SC" value="fallback" />
+              </node>
+              <node concept="3oM_SD" id="5vMXiMGUHnQ" role="1PaTwD">
+                <property role="3oM_SC" value="way" />
+              </node>
+            </node>
+          </node>
+          <node concept="3cpWs8" id="1Swggvms2It" role="3cqZAp">
+            <node concept="3cpWsn" id="1Swggvms2Iu" role="3cpWs9">
+              <property role="TrG5h" value="bla" />
+              <node concept="3uibUv" id="1Swggvms35I" role="1tU5fm">
+                <ref role="3uigEE" node="1TH_SRmEWFS" resolve="Bounds.J" />
+                <node concept="3uibUv" id="1TH_SRmGD_5" role="11_B2D">
+                  <ref role="3uigEE" node="1TH_SRmEWFB" resolve="Bounds.A" />
+                </node>
+              </node>
+              <node concept="2ShNRf" id="1Swggvms8dc" role="33vP2m">
+                <node concept="HV5vD" id="1Swggvms9qI" role="2ShVmc">
+                  <ref role="HV5vE" node="1TH_SRmEWFS" resolve="Bounds.J" />
+                  <node concept="3uibUv" id="1TH_SRmGEpZ" role="HU9BZ">
+                    <ref role="3uigEE" node="1TH_SRmEWFB" resolve="Bounds.A" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="3clFbH" id="1TH_SRmEWI9" role="3cqZAp" />
+          <node concept="3SKdUt" id="1TH_SRmGY9V" role="3cqZAp">
+            <node concept="1PaTwC" id="1TH_SRmGY9W" role="3ndbpf">
+              <node concept="3oM_SD" id="1TH_SRmGY9Y" role="1PaTwD">
+                <property role="3oM_SC" value="FIXME" />
+              </node>
+            </node>
+          </node>
+          <node concept="3cpWs8" id="1TH_SRmGNFD" role="3cqZAp">
+            <node concept="3cpWsn" id="1TH_SRmGNFE" role="3cpWs9">
+              <property role="TrG5h" value="bla2" />
+              <node concept="3uibUv" id="1TH_SRmGNFF" role="1tU5fm">
+                <ref role="3uigEE" node="1TH_SRmEWFS" resolve="Bounds.J" />
+                <node concept="3uibUv" id="1TH_SRmGPET" role="11_B2D">
+                  <ref role="3uigEE" node="1TH_SRmEWFB" resolve="Bounds.A" />
+                </node>
+                <node concept="3uibUv" id="1TH_SRmGPTA" role="11_B2D">
+                  <ref role="3uigEE" node="1TH_SRmEWFB" resolve="Bounds.A" />
+                </node>
+                <node concept="1U20sH" id="5vMXiMGUHrC" role="lGtFl">
+                  <property role="1U20sK" value="error" />
+                </node>
+              </node>
+              <node concept="2ShNRf" id="1TH_SRmGNFG" role="33vP2m">
+                <node concept="HV5vD" id="1TH_SRmGNFH" role="2ShVmc">
+                  <ref role="HV5vE" node="1TH_SRmEWFS" resolve="Bounds.J" />
+                  <node concept="3uibUv" id="1TH_SRmGR7C" role="HU9BZ">
+                    <ref role="3uigEE" node="1TH_SRmEWFB" resolve="Bounds.A" />
+                  </node>
+                  <node concept="3uibUv" id="1TH_SRmGRDo" role="HU9BZ">
+                    <ref role="3uigEE" node="1TH_SRmEWFB" resolve="Bounds.A" />
+                  </node>
+                  <node concept="3uibUv" id="1TH_SRmGSb8" role="HU9BZ">
+                    <ref role="3uigEE" node="1TH_SRmEWFB" resolve="Bounds.A" />
+                  </node>
+                  <node concept="1U20sH" id="5vMXiMGUHEE" role="lGtFl">
+                    <property role="1U20sK" value="error" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="3clFbH" id="1TH_SRmGMv6" role="3cqZAp" />
+        </node>
+        <node concept="3Tm1VV" id="1TH_SRmEWIP" role="1B3o_S" />
+        <node concept="16euLQ" id="1TH_SRmEWIQ" role="16eVyc">
+          <property role="TrG5h" value="T5" />
+          <node concept="3uibUv" id="1TH_SRmEWIR" role="3ztrMU">
+            <ref role="3uigEE" node="1TH_SRmEWFJ" resolve="Bounds.B" />
+          </node>
+        </node>
+        <node concept="16euLQ" id="1TH_SRmEWIS" role="16eVyc">
+          <property role="TrG5h" value="S2" />
+          <node concept="3uibUv" id="1TH_SRmEWIT" role="3ztrMU">
+            <ref role="3uigEE" node="1TH_SRmEWFS" resolve="Bounds.J" />
+            <node concept="3qUtgH" id="1TH_SRmEWIU" role="11_B2D">
+              <node concept="16syzq" id="1TH_SRmEWIV" role="3qUvdb">
+                <ref role="16sUi3" node="1TH_SRmEWIQ" resolve="T5" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="37vLTG" id="1TH_SRmEWIW" role="3clF46">
+          <property role="TrG5h" value="s" />
+          <node concept="16syzq" id="1TH_SRmEWIX" role="1tU5fm">
+            <ref role="16sUi3" node="1TH_SRmEWIS" resolve="S2" />
+          </node>
+        </node>
+        <node concept="37vLTG" id="1TH_SRmEWIY" role="3clF46">
+          <property role="TrG5h" value="h" />
+          <node concept="3uibUv" id="1TH_SRmEWIZ" role="1tU5fm">
+            <ref role="3uigEE" node="1TH_SRmEWG9" resolve="Bounds.H" />
+            <node concept="3uibUv" id="1TH_SRmEWJ0" role="11_B2D">
+              <ref role="3uigEE" node="1TH_SRmEWG5" resolve="Bounds.K" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3clFb_" id="4ekooLalg15" role="jymVt">
+        <property role="TrG5h" value="f2" />
+        <property role="DiZV1" value="false" />
+        <node concept="3cqZAl" id="4ekooLalg16" role="3clF45" />
+        <node concept="3clFbS" id="4ekooLalg17" role="3clF47">
+          <node concept="3cpWs8" id="4ekooLalg1o" role="3cqZAp">
+            <node concept="3cpWsn" id="4ekooLalg1p" role="3cpWs9">
+              <property role="TrG5h" value="g" />
+              <node concept="3uibUv" id="1TH_SRmMhcl" role="1tU5fm">
+                <ref role="3uigEE" node="1TH_SRmEWGi" resolve="Bounds.G" />
+              </node>
+              <node concept="2ShNRf" id="4ekooLalg1r" role="33vP2m">
+                <node concept="HV5vD" id="4ekooLalg1s" role="2ShVmc">
+                  <ref role="HV5vE" node="1TH_SRmEWGi" resolve="Bounds.G" />
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="3clFbH" id="Co5va1RERG" role="3cqZAp" />
+          <node concept="3SKdUt" id="1TH_SRmMpkF" role="3cqZAp">
+            <node concept="1PaTwC" id="1TH_SRmMpkG" role="3ndbpf">
+              <node concept="3oM_SD" id="1TH_SRmMpkI" role="1PaTwD">
+                <property role="3oM_SC" value="FIXME" />
+              </node>
+              <node concept="3oM_SD" id="1TH_SRmMqrF" role="1PaTwD">
+                <property role="3oM_SC" value="the" />
+              </node>
+              <node concept="3oM_SD" id="1TH_SRmMqKK" role="1PaTwD">
+                <property role="3oM_SC" value="following" />
+              </node>
+              <node concept="3oM_SD" id="1TH_SRmMrdP" role="1PaTwD">
+                <property role="3oM_SC" value="line" />
+              </node>
+              <node concept="3oM_SD" id="1TH_SRmMrDL" role="1PaTwD">
+                <property role="3oM_SC" value="must" />
+              </node>
+              <node concept="3oM_SD" id="1TH_SRmMsBk" role="1PaTwD">
+                <property role="3oM_SC" value="typecheck" />
+              </node>
+            </node>
+          </node>
+          <node concept="1X3_iC" id="1TH_SRmMIYy" role="lGtFl">
+            <property role="3V$3am" value="statement" />
+            <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
+            <node concept="3cpWs8" id="1TH_SRmMcgr" role="8Wnug">
+              <node concept="3cpWsn" id="1TH_SRmMcgs" role="3cpWs9">
+                <property role="TrG5h" value="a3" />
+                <node concept="3uibUv" id="1TH_SRmMi14" role="1tU5fm">
+                  <ref role="3uigEE" node="1TH_SRmEWFB" resolve="Bounds.A" />
+                </node>
+                <node concept="2OqwBi" id="1TH_SRmMcgt" role="33vP2m">
+                  <node concept="37vLTw" id="1TH_SRmMcgu" role="2Oq$k0">
+                    <ref role="3cqZAo" node="4ekooLalg1p" resolve="g" />
+                  </node>
+                  <node concept="liA8E" id="1TH_SRmMcgv" role="2OqNvi">
+                    <ref role="37wK5l" node="1TH_SRmEWGH" resolve="g3" />
+                    <node concept="2OqwBi" id="1TH_SRmMcgw" role="37wK5m">
+                      <node concept="37vLTw" id="1TH_SRmMcgx" role="2Oq$k0">
+                        <ref role="3cqZAo" node="4ekooLalg2n" resolve="s" />
+                      </node>
+                      <node concept="liA8E" id="1TH_SRmMcgy" role="2OqNvi">
+                        <ref role="37wK5l" node="1TH_SRmEWFV" resolve="h" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3Tm1VV" id="4ekooLalg2g" role="1B3o_S" />
+        <node concept="16euLQ" id="4ekooLalg2h" role="16eVyc">
+          <property role="TrG5h" value="T6" />
+        </node>
+        <node concept="16euLQ" id="4ekooLalg2j" role="16eVyc">
+          <property role="TrG5h" value="S" />
+          <node concept="3uibUv" id="4ekooLalg2k" role="3ztrMU">
+            <ref role="3uigEE" node="1TH_SRmEWFS" resolve="Bounds.J" />
+            <node concept="3qUtgH" id="4ekooLalg2l" role="11_B2D">
+              <node concept="16syzq" id="4ekooLalg2m" role="3qUvdb">
+                <ref role="16sUi3" node="4ekooLalg2h" resolve="T6" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="37vLTG" id="4ekooLalg2n" role="3clF46">
+          <property role="TrG5h" value="s" />
+          <node concept="16syzq" id="4ekooLalg2o" role="1tU5fm">
+            <ref role="16sUi3" node="4ekooLalg2j" resolve="S" />
+          </node>
+        </node>
+        <node concept="37vLTG" id="4ekooLalg2p" role="3clF46">
+          <property role="TrG5h" value="h" />
+          <node concept="3uibUv" id="4ekooLalg2q" role="1tU5fm">
+            <ref role="3uigEE" node="1TH_SRmEWG9" resolve="Bounds.H" />
+            <node concept="3uibUv" id="1TH_SRmMgr6" role="11_B2D">
+              <ref role="3uigEE" node="1TH_SRmEWG5" resolve="Bounds.K" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="1TH_SRmEWJ1" role="jymVt" />
+  </node>
+</model>
+
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/staging.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.staging.mps
similarity index 67%
rename from samples/mpscore/solutions/typechecking.samples.baseLanguage/models/staging.mps
rename to samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.staging.mps
index becad332..aefb441a 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/staging.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.staging.mps
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:b309cb56-3611-4c81-a828-546d9de592a2(typechecking.samples.baseLanguage.staging)" doNotGenerate="true">
+<model ref="r:1ea6d6af-a343-425c-8096-c1bf7ddb3cb0(jetbrains.mps.baseLanguageExt.test.code.staging)" doNotGenerate="true">
   <persistence version="9" />
   <languages>
     <use id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage" version="9" />
@@ -14,7 +14,16 @@
   </imports>
   <registry>
     <language id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage">
+      <concept id="1202948039474" name="jetbrains.mps.baseLanguage.structure.InstanceMethodCallOperation" flags="nn" index="liA8E" />
       <concept id="1465982738277781862" name="jetbrains.mps.baseLanguage.structure.PlaceholderMember" flags="ng" index="2tJIrI" />
+      <concept id="2820489544401957797" name="jetbrains.mps.baseLanguage.structure.DefaultClassCreator" flags="nn" index="HV5vD">
+        <reference id="2820489544401957798" name="classifier" index="HV5vE" />
+        <child id="2820489544402271667" name="typeParameter" index="HU9BZ" />
+      </concept>
+      <concept id="1197027756228" name="jetbrains.mps.baseLanguage.structure.DotExpression" flags="nn" index="2OqwBi">
+        <child id="1197027771414" name="operand" index="2Oq$k0" />
+        <child id="1197027833540" name="operation" index="2OqNvi" />
+      </concept>
       <concept id="1145552977093" name="jetbrains.mps.baseLanguage.structure.GenericNewExpression" flags="nn" index="2ShNRf">
         <child id="1145553007750" name="creator" index="2ShVmc" />
       </concept>
@@ -79,6 +88,7 @@
       <concept id="1204053956946" name="jetbrains.mps.baseLanguage.structure.IMethodCall" flags="ng" index="1ndlxa">
         <reference id="1068499141037" name="baseMethodDeclaration" index="37wK5l" />
         <child id="1068499141038" name="actualArgument" index="37wK5m" />
+        <child id="4972241301747169160" name="typeArgument" index="3PaCim" />
       </concept>
       <concept id="1212685548494" name="jetbrains.mps.baseLanguage.structure.ClassCreator" flags="nn" index="1pGfFk">
         <child id="1212687122400" name="typeParameter" index="1pMfVU" />
@@ -862,5 +872,423 @@
     </node>
     <node concept="3Tm1VV" id="2rIdnPtvpA1" role="1B3o_S" />
   </node>
+  <node concept="312cEu" id="6EY0p2x_6$D">
+    <property role="TrG5h" value="RawGenerics" />
+    <node concept="2tJIrI" id="6EY0p2x_6$F" role="jymVt" />
+    <node concept="2tJIrI" id="6EY0p2x_6$H" role="jymVt" />
+    <node concept="312cEu" id="6EY0p2x_6$Z" role="jymVt">
+      <property role="2bfB8j" value="false" />
+      <property role="TrG5h" value="ExpectListOfNumber" />
+      <node concept="3Tm1VV" id="6EY0p2x_6_0" role="1B3o_S" />
+      <node concept="16euLQ" id="6EY0p2x_6_k" role="16eVyc">
+        <property role="TrG5h" value="T" />
+        <node concept="3uibUv" id="6EY0p2x_6_s" role="3ztrMU">
+          <ref role="3uigEE" to="33ny:~List" resolve="List" />
+          <node concept="3uibUv" id="6EY0p2x_6_z" role="11_B2D">
+            <ref role="3uigEE" to="wyt6:~Number" resolve="Number" />
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_gi4" role="jymVt" />
+    <node concept="312cEu" id="6EY0p2x_ghZ" role="jymVt">
+      <property role="2bfB8j" value="false" />
+      <property role="TrG5h" value="ExpectList" />
+      <node concept="3Tm1VV" id="6EY0p2x_gi0" role="1B3o_S" />
+      <node concept="16euLQ" id="6EY0p2x_gi1" role="16eVyc">
+        <property role="TrG5h" value="T" />
+        <node concept="3uibUv" id="6EY0p2x_gi2" role="3ztrMU">
+          <ref role="3uigEE" to="33ny:~List" resolve="List" />
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_6$O" role="jymVt" />
+    <node concept="312cEu" id="6EY0p2x_6Tu" role="jymVt">
+      <property role="2bfB8j" value="false" />
+      <property role="TrG5h" value="C" />
+      <node concept="2tJIrI" id="6EY0p2x_6Ui" role="jymVt" />
+      <node concept="3clFb_" id="6EY0p2x_6Ur" role="jymVt">
+        <property role="TrG5h" value="expectListOfNumber" />
+        <node concept="3uibUv" id="6EY0p2x_7nZ" role="3clF45">
+          <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+        </node>
+        <node concept="3Tm1VV" id="6EY0p2x_6Uu" role="1B3o_S" />
+        <node concept="3clFbS" id="6EY0p2x_6Uv" role="3clF47">
+          <node concept="3cpWs6" id="6EY0p2x_f3_" role="3cqZAp">
+            <node concept="10Nm6u" id="6EY0p2x_7oi" role="3cqZAk" />
+          </node>
+        </node>
+        <node concept="16euLQ" id="6EY0p2x_6UC" role="16eVyc">
+          <property role="TrG5h" value="T" />
+          <node concept="3uibUv" id="6EY0p2x_6UI" role="3ztrMU">
+            <ref role="3uigEE" to="33ny:~List" resolve="List" />
+            <node concept="3uibUv" id="6EY0p2x_6UP" role="11_B2D">
+              <ref role="3uigEE" to="wyt6:~Number" resolve="Number" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="2tJIrI" id="6EY0p2x_gb9" role="jymVt" />
+      <node concept="3clFb_" id="6EY0p2x_gax" role="jymVt">
+        <property role="TrG5h" value="expectList" />
+        <node concept="3uibUv" id="6EY0p2x_gay" role="3clF45">
+          <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+        </node>
+        <node concept="3Tm1VV" id="6EY0p2x_gaz" role="1B3o_S" />
+        <node concept="3clFbS" id="6EY0p2x_ga$" role="3clF47">
+          <node concept="3cpWs6" id="6EY0p2x_ga_" role="3cqZAp">
+            <node concept="10Nm6u" id="6EY0p2x_gaA" role="3cqZAk" />
+          </node>
+        </node>
+        <node concept="16euLQ" id="6EY0p2x_gaB" role="16eVyc">
+          <property role="TrG5h" value="T" />
+          <node concept="3uibUv" id="6EY0p2x_gaC" role="3ztrMU">
+            <ref role="3uigEE" to="33ny:~List" resolve="List" />
+          </node>
+        </node>
+      </node>
+      <node concept="2tJIrI" id="6EY0p2x_7za" role="jymVt" />
+      <node concept="3clFb_" id="6EY0p2x_7yH" role="jymVt">
+        <property role="TrG5h" value="expectListOfT" />
+        <node concept="16syzq" id="6EY0p2x_7Fr" role="3clF45">
+          <ref role="16sUi3" node="6EY0p2x_7zw" resolve="T" />
+        </node>
+        <node concept="3Tm1VV" id="6EY0p2x_7yJ" role="1B3o_S" />
+        <node concept="3clFbS" id="6EY0p2x_7yK" role="3clF47">
+          <node concept="3cpWs6" id="6EY0p2x_f3U" role="3cqZAp">
+            <node concept="10Nm6u" id="6EY0p2x_7yM" role="3cqZAk" />
+          </node>
+        </node>
+        <node concept="16euLQ" id="6EY0p2x_7zw" role="16eVyc">
+          <property role="TrG5h" value="T" />
+        </node>
+        <node concept="16euLQ" id="6EY0p2x_7yN" role="16eVyc">
+          <property role="TrG5h" value="S" />
+          <node concept="3uibUv" id="6EY0p2x_7yO" role="3ztrMU">
+            <ref role="3uigEE" to="33ny:~List" resolve="List" />
+            <node concept="16syzq" id="6EY0p2x_7z_" role="11_B2D">
+              <ref role="16sUi3" node="6EY0p2x_7zw" resolve="T" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="2tJIrI" id="6EY0p2x_6Un" role="jymVt" />
+      <node concept="3Tm1VV" id="6EY0p2x_6Tv" role="1B3o_S" />
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_6Sj" role="jymVt" />
+    <node concept="2tJIrI" id="6EY0p2x_6SS" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_6_X" role="jymVt">
+      <property role="TrG5h" value="test1" />
+      <node concept="3cqZAl" id="6EY0p2x_6_Z" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_6A0" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_6A1" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_6L1" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_6L2" role="3cpWs9">
+            <property role="TrG5h" value="error" />
+            <node concept="3uibUv" id="6EY0p2x_7x0" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+            </node>
+            <node concept="2ShNRf" id="6EY0p2x_6L3" role="33vP2m">
+              <node concept="HV5vD" id="6EY0p2x_6L4" role="2ShVmc">
+                <ref role="HV5vE" node="6EY0p2x_6$Z" resolve="RawGenerics.ExpectListOfNumber" />
+                <node concept="3uibUv" id="6EY0p2x_6L5" role="HU9BZ">
+                  <ref role="3uigEE" to="33ny:~List" resolve="List" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_gnE" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_gkI" role="jymVt">
+      <property role="TrG5h" value="test1a" />
+      <node concept="3cqZAl" id="6EY0p2x_gkJ" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_gkK" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_gkL" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_gkM" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_gkN" role="3cpWs9">
+            <property role="TrG5h" value="error" />
+            <node concept="3uibUv" id="6EY0p2x_gkO" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+            </node>
+            <node concept="2ShNRf" id="6EY0p2x_gkP" role="33vP2m">
+              <node concept="HV5vD" id="6EY0p2x_gkQ" role="2ShVmc">
+                <ref role="HV5vE" node="6EY0p2x_ghZ" resolve="RawGenerics.ExpectList" />
+                <node concept="3uibUv" id="6EY0p2x_gkR" role="HU9BZ">
+                  <ref role="3uigEE" to="33ny:~List" resolve="List" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_6Nz" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_6MS" role="jymVt">
+      <property role="TrG5h" value="test2" />
+      <node concept="3cqZAl" id="6EY0p2x_6MT" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_6MU" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_6MV" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_6Qk" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_6Ql" role="3cpWs9">
+            <property role="TrG5h" value="ok" />
+            <node concept="3uibUv" id="6EY0p2x_7x6" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+            </node>
+            <node concept="2ShNRf" id="6EY0p2x_6Qm" role="33vP2m">
+              <node concept="HV5vD" id="6EY0p2x_6Qn" role="2ShVmc">
+                <ref role="HV5vE" node="6EY0p2x_6$Z" resolve="RawGenerics.ExpectListOfNumber" />
+                <node concept="3uibUv" id="6EY0p2x_6Qo" role="HU9BZ">
+                  <ref role="3uigEE" to="33ny:~ArrayList" resolve="ArrayList" />
+                  <node concept="3uibUv" id="6EY0p2x_6Qp" role="11_B2D">
+                    <ref role="3uigEE" to="wyt6:~Number" resolve="Number" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_guc" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_gr3" role="jymVt">
+      <property role="TrG5h" value="test2a" />
+      <node concept="3cqZAl" id="6EY0p2x_gr4" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_gr5" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_gr6" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_gr7" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_gr8" role="3cpWs9">
+            <property role="TrG5h" value="ok" />
+            <node concept="3uibUv" id="6EY0p2x_gr9" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+            </node>
+            <node concept="2ShNRf" id="6EY0p2x_gra" role="33vP2m">
+              <node concept="HV5vD" id="6EY0p2x_grb" role="2ShVmc">
+                <ref role="HV5vE" node="6EY0p2x_ghZ" resolve="RawGenerics.ExpectList" />
+                <node concept="3uibUv" id="6EY0p2x_grc" role="HU9BZ">
+                  <ref role="3uigEE" to="33ny:~ArrayList" resolve="ArrayList" />
+                  <node concept="3uibUv" id="6EY0p2x_grd" role="11_B2D">
+                    <ref role="3uigEE" to="wyt6:~Number" resolve="Number" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_6US" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_6Wr" role="jymVt">
+      <property role="TrG5h" value="test3" />
+      <node concept="3cqZAl" id="6EY0p2x_6Wt" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_6Wu" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_6Wv" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_7rp" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_7rq" role="3cpWs9">
+            <property role="TrG5h" value="ok" />
+            <node concept="3uibUv" id="6EY0p2x_7rr" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+            </node>
+            <node concept="2OqwBi" id="6EY0p2x_7rI" role="33vP2m">
+              <node concept="2ShNRf" id="6EY0p2x_7sr" role="2Oq$k0">
+                <node concept="HV5vD" id="6EY0p2x_7ss" role="2ShVmc">
+                  <ref role="HV5vE" node="6EY0p2x_6Tu" resolve="RawGenerics.C" />
+                </node>
+              </node>
+              <node concept="liA8E" id="6EY0p2x_7rK" role="2OqNvi">
+                <ref role="37wK5l" node="6EY0p2x_6Ur" resolve="expectListOfNumber" />
+                <node concept="3uibUv" id="6EY0p2x_7rL" role="3PaCim">
+                  <ref role="3uigEE" to="33ny:~List" resolve="List" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_7ua" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_7sB" role="jymVt">
+      <property role="TrG5h" value="test4" />
+      <node concept="3cqZAl" id="6EY0p2x_7sC" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_7sD" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_7sE" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_7sF" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_7sG" role="3cpWs9">
+            <property role="TrG5h" value="error" />
+            <node concept="3uibUv" id="6EY0p2x_7sH" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+            </node>
+            <node concept="2OqwBi" id="6EY0p2x_7sI" role="33vP2m">
+              <node concept="2ShNRf" id="6EY0p2x_7sJ" role="2Oq$k0">
+                <node concept="HV5vD" id="6EY0p2x_7sK" role="2ShVmc">
+                  <ref role="HV5vE" node="6EY0p2x_6Tu" resolve="RawGenerics.C" />
+                </node>
+              </node>
+              <node concept="liA8E" id="6EY0p2x_7sL" role="2OqNvi">
+                <ref role="37wK5l" node="6EY0p2x_6Ur" resolve="expectListOfNumber" />
+                <node concept="3uibUv" id="6EY0p2x_7sM" role="3PaCim">
+                  <ref role="3uigEE" to="33ny:~List" resolve="List" />
+                  <node concept="17QB3L" id="6EY0p2x_gau" role="11_B2D" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_7_z" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_gcu" role="jymVt">
+      <property role="TrG5h" value="test3a" />
+      <node concept="3cqZAl" id="6EY0p2x_gcv" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_gcw" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_gcx" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_gcy" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_gcz" role="3cpWs9">
+            <property role="TrG5h" value="ok" />
+            <node concept="3uibUv" id="6EY0p2x_gc$" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+            </node>
+            <node concept="2OqwBi" id="6EY0p2x_gc_" role="33vP2m">
+              <node concept="2ShNRf" id="6EY0p2x_gcA" role="2Oq$k0">
+                <node concept="HV5vD" id="6EY0p2x_gcB" role="2ShVmc">
+                  <ref role="HV5vE" node="6EY0p2x_6Tu" resolve="RawGenerics.C" />
+                </node>
+              </node>
+              <node concept="liA8E" id="6EY0p2x_gcC" role="2OqNvi">
+                <ref role="37wK5l" node="6EY0p2x_gax" resolve="expectList" />
+                <node concept="3uibUv" id="6EY0p2x_gcD" role="3PaCim">
+                  <ref role="3uigEE" to="33ny:~List" resolve="List" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_gct" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_gcg" role="jymVt">
+      <property role="TrG5h" value="test4a" />
+      <node concept="3cqZAl" id="6EY0p2x_gch" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_gci" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_gcj" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_gck" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_gcl" role="3cpWs9">
+            <property role="TrG5h" value="ok" />
+            <node concept="3uibUv" id="6EY0p2x_gcm" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~Object" resolve="Object" />
+            </node>
+            <node concept="2OqwBi" id="6EY0p2x_gcn" role="33vP2m">
+              <node concept="2ShNRf" id="6EY0p2x_gco" role="2Oq$k0">
+                <node concept="HV5vD" id="6EY0p2x_gcp" role="2ShVmc">
+                  <ref role="HV5vE" node="6EY0p2x_6Tu" resolve="RawGenerics.C" />
+                </node>
+              </node>
+              <node concept="liA8E" id="6EY0p2x_gcq" role="2OqNvi">
+                <ref role="37wK5l" node="6EY0p2x_gax" resolve="expectList" />
+                <node concept="3uibUv" id="6EY0p2x_gcr" role="3PaCim">
+                  <ref role="3uigEE" to="33ny:~List" resolve="List" />
+                  <node concept="17QB3L" id="6EY0p2x_gcs" role="11_B2D" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_gcf" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_7zC" role="jymVt">
+      <property role="TrG5h" value="test5" />
+      <node concept="3cqZAl" id="6EY0p2x_7zD" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_7zE" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_7zF" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_7zG" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_7zH" role="3cpWs9">
+            <property role="TrG5h" value="ok" />
+            <node concept="3uibUv" id="6EY0p2x_7Bw" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~String" resolve="String" />
+            </node>
+            <node concept="2OqwBi" id="6EY0p2x_7zJ" role="33vP2m">
+              <node concept="2ShNRf" id="6EY0p2x_7zK" role="2Oq$k0">
+                <node concept="HV5vD" id="6EY0p2x_7zL" role="2ShVmc">
+                  <ref role="HV5vE" node="6EY0p2x_6Tu" resolve="RawGenerics.C" />
+                </node>
+              </node>
+              <node concept="liA8E" id="6EY0p2x_7zM" role="2OqNvi">
+                <ref role="37wK5l" node="6EY0p2x_7yH" resolve="expectListOfT" />
+                <node concept="17QB3L" id="6EY0p2x_7Dn" role="3PaCim" />
+                <node concept="3uibUv" id="6EY0p2x_7zN" role="3PaCim">
+                  <ref role="3uigEE" to="33ny:~List" resolve="List" />
+                  <node concept="17QB3L" id="6EY0p2x_7DN" role="11_B2D" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_6$T" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_7Mx" role="jymVt">
+      <property role="TrG5h" value="test6" />
+      <node concept="3cqZAl" id="6EY0p2x_7My" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_7Mz" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_7M$" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_7M_" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_7MA" role="3cpWs9">
+            <property role="TrG5h" value="ok" />
+            <node concept="3uibUv" id="6EY0p2x_7MB" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~String" resolve="String" />
+            </node>
+            <node concept="2OqwBi" id="6EY0p2x_7MC" role="33vP2m">
+              <node concept="2ShNRf" id="6EY0p2x_7MD" role="2Oq$k0">
+                <node concept="HV5vD" id="6EY0p2x_7ME" role="2ShVmc">
+                  <ref role="HV5vE" node="6EY0p2x_6Tu" resolve="RawGenerics.C" />
+                </node>
+              </node>
+              <node concept="liA8E" id="6EY0p2x_7MF" role="2OqNvi">
+                <ref role="37wK5l" node="6EY0p2x_7yH" resolve="expectListOfT" />
+                <node concept="17QB3L" id="6EY0p2x_7MG" role="3PaCim" />
+                <node concept="3uibUv" id="6EY0p2x_7MH" role="3PaCim">
+                  <ref role="3uigEE" to="33ny:~List" resolve="List" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_7Qx" role="jymVt" />
+    <node concept="3clFb_" id="6EY0p2x_7Qk" role="jymVt">
+      <property role="TrG5h" value="test7" />
+      <node concept="3cqZAl" id="6EY0p2x_7Ql" role="3clF45" />
+      <node concept="3Tm1VV" id="6EY0p2x_7Qm" role="1B3o_S" />
+      <node concept="3clFbS" id="6EY0p2x_7Qn" role="3clF47">
+        <node concept="3cpWs8" id="6EY0p2x_7Qo" role="3cqZAp">
+          <node concept="3cpWsn" id="6EY0p2x_7Qp" role="3cpWs9">
+            <property role="TrG5h" value="ok" />
+            <node concept="3uibUv" id="6EY0p2x_7Qq" role="1tU5fm">
+              <ref role="3uigEE" to="wyt6:~String" resolve="String" />
+            </node>
+            <node concept="2OqwBi" id="6EY0p2x_7Qr" role="33vP2m">
+              <node concept="2ShNRf" id="6EY0p2x_7Qs" role="2Oq$k0">
+                <node concept="HV5vD" id="6EY0p2x_7Qt" role="2ShVmc">
+                  <ref role="HV5vE" node="6EY0p2x_6Tu" resolve="RawGenerics.C" />
+                </node>
+              </node>
+              <node concept="liA8E" id="6EY0p2x_7Qu" role="2OqNvi">
+                <ref role="37wK5l" node="6EY0p2x_7yH" resolve="expectListOfT" />
+                <node concept="17QB3L" id="6EY0p2x_7Qv" role="3PaCim" />
+                <node concept="3uibUv" id="6EY0p2x_7SI" role="3PaCim">
+                  <ref role="3uigEE" to="33ny:~ArrayList" resolve="ArrayList" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="6EY0p2x_7Mw" role="jymVt" />
+    <node concept="3Tm1VV" id="6EY0p2x_6$E" role="1B3o_S" />
+  </node>
 </model>
 
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.codeAnal.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.thinlet.mps
similarity index 99%
rename from samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.codeAnal.mps
rename to samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.thinlet.mps
index fa78e9cb..67ca1f45 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.codeAnal.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.code.thinlet.mps
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:1f3a7853-f20c-4f91-9912-5e82d9d1651a(typechecking.samples.baseLanguage.codeAnal)" doNotGenerate="true">
+<model ref="r:a3cbed52-2cb3-4f5f-bddd-c7d6bae97d47(jetbrains.mps.baseLanguageExt.test.code.thinlet)" doNotGenerate="true">
   <persistence version="9" />
   <languages>
     <use id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage" version="9" />
diff --git a/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.dummy.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.dummy.mps
new file mode 100644
index 00000000..6351773b
--- /dev/null
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.dummy.mps
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<model ref="r:655faa95-25e5-4157-883a-dbf510d8b160(jetbrains.mps.baseLanguageExt.test.dummy)">
+  <persistence version="9" />
+  <languages />
+  <imports />
+  <registry />
+</model>
+
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/features@tests.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.features@tests.mps
similarity index 92%
rename from samples/mpscore/solutions/typechecking.samples.baseLanguage/models/features@tests.mps
rename to samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.features@tests.mps
index 5f6ed332..b63971cf 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/features@tests.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.features@tests.mps
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:edd793b1-5d54-477c-b734-287412ef4ebc(typechecking.samples.baseLanguage.features@tests)">
+<model ref="r:1ded08f9-d5a9-4ce5-b762-96fe8abe4cec(jetbrains.mps.baseLanguageExt.test.features@tests)">
   <persistence version="9" />
   <languages>
     <use id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test" version="5" />
@@ -10,9 +10,9 @@
   </languages>
   <imports>
     <import index="tpee" ref="r:00000000-0000-4000-0000-011c895902ca(jetbrains.mps.baseLanguage.structure)" />
-    <import index="96nh" ref="r:0a51f978-f7e7-4ce4-89ac-69fc1d6b1a8d(typechecking.samples.baseLanguage.features)" />
     <import index="tj24" ref="r:0fbbb63a-fd15-46e1-8136-78049f6d6e63(jetbrains.mps.coderules.typechecking.service)" />
     <import index="z1c3" ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea/java:jetbrains.mps.project(MPS.Core/)" />
+    <import index="yg5v" ref="r:24bdfe1a-5c8f-4e02-bf75-2d22a609ac69(jetbrains.mps.baseLanguageExt.test.code.features)" />
   </imports>
   <registry>
     <language id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test">
@@ -228,7 +228,7 @@
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="27bTNFfc0ij" role="2XxRq1">
                     <node concept="ZC_QK" id="27bTNFfc0ik" role="2tJFKM">
-                      <ref role="2aWVGs" to="96nh:5s5QomKHFub" resolve="IntByteConversion" />
+                      <ref role="2aWVGs" to="yg5v:5s5QomKHFub" resolve="IntByteConversion" />
                     </node>
                   </node>
                 </node>
@@ -257,7 +257,7 @@
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="27bTNFfc0DW" role="2XxRq1">
                     <node concept="ZC_QK" id="27bTNFfc0DX" role="2tJFKM">
-                      <ref role="2aWVGs" to="96nh:3Cu2imBSO5x" resolve="CharConversion" />
+                      <ref role="2aWVGs" to="yg5v:3Cu2imBSO5x" resolve="CharConversion" />
                     </node>
                   </node>
                 </node>
@@ -286,7 +286,7 @@
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="27bTNFfc0HM" role="2XxRq1">
                     <node concept="ZC_QK" id="27bTNFfc0HN" role="2tJFKM">
-                      <ref role="2aWVGs" to="96nh:6EY0p2ylujy" resolve="IntShortConversion" />
+                      <ref role="2aWVGs" to="yg5v:6EY0p2ylujy" resolve="IntShortConversion" />
                     </node>
                   </node>
                 </node>
@@ -338,7 +338,7 @@
                     <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                     <node concept="2tJFMh" id="27bTNFfc0LC" role="2XxRq1">
                       <node concept="ZC_QK" id="27bTNFfc0LD" role="2tJFKM">
-                        <ref role="2aWVGs" to="96nh:2HYHa0WUDvm" resolve="GenericNewExpression" />
+                        <ref role="2aWVGs" to="yg5v:2HYHa0WUDvm" resolve="GenericNewExpression" />
                       </node>
                     </node>
                   </node>
@@ -371,7 +371,7 @@
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="27bTNFfc0Pu" role="2XxRq1">
                     <node concept="ZC_QK" id="27bTNFfc0Pv" role="2tJFKM">
-                      <ref role="2aWVGs" to="96nh:6EY0p2wAiyu" resolve="InstanceMethod" />
+                      <ref role="2aWVGs" to="yg5v:6EY0p2wAiyu" resolve="InstanceMethod" />
                     </node>
                   </node>
                 </node>
@@ -400,7 +400,7 @@
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="27bTNFfc18b" role="2XxRq1">
                     <node concept="ZC_QK" id="27bTNFfc18c" role="2tJFKM">
-                      <ref role="2aWVGs" to="96nh:6EY0p2ymmj_" resolve="StaticMethod" />
+                      <ref role="2aWVGs" to="yg5v:6EY0p2ymmj_" resolve="StaticMethod" />
                     </node>
                   </node>
                 </node>
@@ -429,7 +429,7 @@
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="27bTNFfc1c1" role="2XxRq1">
                     <node concept="ZC_QK" id="27bTNFfc1c2" role="2tJFKM">
-                      <ref role="2aWVGs" to="96nh:5XJPBczwaPg" resolve="PrimitiveTypes" />
+                      <ref role="2aWVGs" to="yg5v:5XJPBczwaPg" resolve="PrimitiveTypes" />
                     </node>
                   </node>
                 </node>
@@ -458,7 +458,7 @@
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="Or3zaY2I7" role="2XxRq1">
                     <node concept="ZC_QK" id="Or3zaY35I" role="2tJFKM">
-                      <ref role="2aWVGs" to="96nh:Or3zaY2v0" resolve="ArrayTypes" />
+                      <ref role="2aWVGs" to="yg5v:Or3zaY2v0" resolve="ArrayTypes" />
                     </node>
                   </node>
                 </node>
@@ -487,7 +487,7 @@
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="1yt2T3T4TBf" role="2XxRq1">
                     <node concept="ZC_QK" id="1yt2T3T4TRz" role="2tJFKM">
-                      <ref role="2aWVGs" to="96nh:1yt2T3T4FOh" resolve="Varargs" />
+                      <ref role="2aWVGs" to="yg5v:1yt2T3T4FOh" resolve="Varargs" />
                     </node>
                   </node>
                 </node>
@@ -501,6 +501,35 @@
         </node>
       </node>
     </node>
+    <node concept="1LZb2c" id="PltxfHwhDC" role="1SL9yI">
+      <property role="TrG5h" value="Lub" />
+      <node concept="3cqZAl" id="PltxfHwhDD" role="3clF45" />
+      <node concept="3clFbS" id="PltxfHwhDH" role="3clF47">
+        <node concept="2Hmddi" id="PltxfHwhRP" role="3cqZAp">
+          <node concept="2OqwBi" id="PltxfHwhRQ" role="2Hmdds">
+            <node concept="2YIFZM" id="PltxfHwhRR" role="2Oq$k0">
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
+              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <node concept="2OqwBi" id="PltxfHwhRS" role="37wK5m">
+                <node concept="2WthIp" id="PltxfHwhRT" role="2Oq$k0" />
+                <node concept="2XshWL" id="PltxfHwhRU" role="2OqNvi">
+                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
+                  <node concept="2tJFMh" id="PltxfHwhRV" role="2XxRq1">
+                    <node concept="ZC_QK" id="PltxfHwhYE" role="2tJFKM">
+                      <ref role="2aWVGs" to="yg5v:2VOKs1ArylV" resolve="Lub" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1jxXqW" id="PltxfHwhRX" role="37wK5m" />
+            </node>
+            <node concept="liA8E" id="PltxfHwhRY" role="2OqNvi">
+              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
   </node>
 </model>
 
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/slice@tests.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.generics@tests.mps
similarity index 62%
rename from samples/mpscore/solutions/typechecking.samples.baseLanguage/models/slice@tests.mps
rename to samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.generics@tests.mps
index b80157b6..e5b51d08 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/slice@tests.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.generics@tests.mps
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:0972c651-627a-4ccd-a36d-473e448a2f07(typechecking.samples.baseLanguage.slice@tests)">
+<model ref="r:ecdbabcb-1e21-4cda-a151-ac712c4dd623(jetbrains.mps.baseLanguageExt.test.generics@tests)">
   <persistence version="9" />
   <languages>
     <use id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test" version="5" />
@@ -9,8 +9,8 @@
   </languages>
   <imports>
     <import index="tpee" ref="r:00000000-0000-4000-0000-011c895902ca(jetbrains.mps.baseLanguage.structure)" />
-    <import index="9oqm" ref="r:a8ff5933-0f6e-4d4a-af4a-5da865d78faf(typechecking.samples.baseLanguage.slice)" />
     <import index="tj24" ref="r:0fbbb63a-fd15-46e1-8136-78049f6d6e63(jetbrains.mps.coderules.typechecking.service)" />
+    <import index="wqtl" ref="r:3be3464b-7052-4e73-b8e9-dc5802b8d5a9(jetbrains.mps.baseLanguageExt.test.code.generics)" />
     <import index="z1c3" ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea/java:jetbrains.mps.project(MPS.Core/)" implicit="true" />
     <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" implicit="true" />
   </imports>
@@ -207,21 +207,85 @@
       <node concept="3Tm6S6" id="35YJGAJTxCl" role="1B3o_S" />
     </node>
     <node concept="1LZb2c" id="1N_0WA5DT8G" role="1SL9yI">
-      <property role="TrG5h" value="ComplexTypeErasure" />
+      <property role="TrG5h" value="SimpleGenerics" />
       <node concept="3cqZAl" id="1N_0WA5DT8H" role="3clF45" />
       <node concept="3clFbS" id="1N_0WA5DT8I" role="3clF47">
+        <node concept="2Hmddi" id="27bTNFfbxhc" role="3cqZAp">
+          <node concept="2OqwBi" id="27bTNFfbxhd" role="2Hmdds">
+            <node concept="2YIFZM" id="27bTNFfbxhe" role="2Oq$k0">
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
+              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <node concept="2OqwBi" id="27bTNFfbX4L" role="37wK5m">
+                <node concept="2WthIp" id="27bTNFfbX4M" role="2Oq$k0" />
+                <node concept="2XshWL" id="27bTNFfbX4N" role="2OqNvi">
+                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
+                  <node concept="2tJFMh" id="27bTNFfbX4O" role="2XxRq1">
+                    <node concept="ZC_QK" id="27bTNFfbX4P" role="2tJFKM">
+                      <ref role="2aWVGs" to="wqtl:3Qp4N06bAlL" resolve="SimpleGenerics" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1jxXqW" id="27bTNFfbX6K" role="37wK5m" />
+            </node>
+            <node concept="liA8E" id="27bTNFfbxhh" role="2OqNvi">
+              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3uibUv" id="4BHjwwGPCTZ" role="Sfmx6">
+        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
+      </node>
+    </node>
+    <node concept="1LZb2c" id="1N_0WA5JFrN" role="1SL9yI">
+      <property role="TrG5h" value="SimpleGenerics2" />
+      <node concept="3cqZAl" id="1N_0WA5JFrO" role="3clF45" />
+      <node concept="3clFbS" id="1N_0WA5JFrP" role="3clF47">
+        <node concept="2Hmddi" id="27bTNFfbxhI" role="3cqZAp">
+          <node concept="2OqwBi" id="27bTNFfbxhJ" role="2Hmdds">
+            <node concept="2YIFZM" id="27bTNFfbxhK" role="2Oq$k0">
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
+              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <node concept="2OqwBi" id="27bTNFfbX8B" role="37wK5m">
+                <node concept="2WthIp" id="27bTNFfbX8C" role="2Oq$k0" />
+                <node concept="2XshWL" id="27bTNFfbX8D" role="2OqNvi">
+                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
+                  <node concept="2tJFMh" id="27bTNFfbX8E" role="2XxRq1">
+                    <node concept="ZC_QK" id="27bTNFfbX8F" role="2tJFKM">
+                      <ref role="2aWVGs" to="wqtl:623frvF_qs8" resolve="SimpleGenerics2" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1jxXqW" id="27bTNFfbXaA" role="37wK5m" />
+            </node>
+            <node concept="liA8E" id="27bTNFfbxhN" role="2OqNvi">
+              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3uibUv" id="4BHjwwGPDri" role="Sfmx6">
+        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
+      </node>
+    </node>
+    <node concept="1LZb2c" id="1TH_SRmAKUM" role="1SL9yI">
+      <property role="TrG5h" value="ComplexTypeErasure" />
+      <node concept="3cqZAl" id="1TH_SRmAKUN" role="3clF45" />
+      <node concept="3clFbS" id="1TH_SRmAKUO" role="3clF47">
         <node concept="2Hmddi" id="27bTNFfbxig" role="3cqZAp">
           <node concept="2OqwBi" id="27bTNFfbxih" role="2Hmdds">
             <node concept="2YIFZM" id="27bTNFfbxii" role="2Oq$k0">
-              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
               <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
               <node concept="2OqwBi" id="27bTNFfc4Cj" role="37wK5m">
                 <node concept="2WthIp" id="27bTNFfc4Ck" role="2Oq$k0" />
                 <node concept="2XshWL" id="27bTNFfc4Cl" role="2OqNvi">
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="27bTNFfc4Cm" role="2XxRq1">
                     <node concept="ZC_QK" id="27bTNFfc4Cn" role="2tJFKM">
-                      <ref role="2aWVGs" to="9oqm:61vfVfpb5w1" resolve="ComplexTypeErasure" />
+                      <ref role="2aWVGs" to="wqtl:61vfVfpb5w1" resolve="ComplexTypeErasure" />
                     </node>
                   </node>
                 </node>
@@ -253,7 +317,7 @@
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                   <node concept="2tJFMh" id="27bTNFfc4Gc" role="2XxRq1">
                     <node concept="ZC_QK" id="27bTNFfc4Gd" role="2tJFKM">
-                      <ref role="2aWVGs" to="9oqm:61vfVfp6EBu" resolve="GenericSubst" />
+                      <ref role="2aWVGs" to="wqtl:61vfVfp6EBu" resolve="GenericSubst" />
                     </node>
                   </node>
                 </node>
@@ -270,6 +334,131 @@
         <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
       </node>
     </node>
+    <node concept="1LZb2c" id="2PEDwPSdjJh" role="1SL9yI">
+      <property role="TrG5h" value="Containment" />
+      <node concept="3cqZAl" id="2PEDwPSdjJi" role="3clF45" />
+      <node concept="3clFbS" id="2PEDwPSdjJj" role="3clF47">
+        <node concept="2Hmddi" id="2PEDwPSdjJk" role="3cqZAp">
+          <node concept="2OqwBi" id="2PEDwPSdjJl" role="2Hmdds">
+            <node concept="2YIFZM" id="2PEDwPSdjJm" role="2Oq$k0">
+              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
+              <node concept="2OqwBi" id="2PEDwPSdjJn" role="37wK5m">
+                <node concept="2WthIp" id="2PEDwPSdjJo" role="2Oq$k0" />
+                <node concept="2XshWL" id="2PEDwPSdjJp" role="2OqNvi">
+                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
+                  <node concept="2tJFMh" id="2PEDwPSdjJq" role="2XxRq1">
+                    <node concept="ZC_QK" id="2PEDwPSdkaa" role="2tJFKM">
+                      <ref role="2aWVGs" to="wqtl:2PEDwPSdaaD" resolve="Containment" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1jxXqW" id="2PEDwPSdjJs" role="37wK5m" />
+            </node>
+            <node concept="liA8E" id="2PEDwPSdjJt" role="2OqNvi">
+              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1LZb2c" id="5DSQNPPS8E8" role="1SL9yI">
+      <property role="TrG5h" value="Variance" />
+      <node concept="3cqZAl" id="5DSQNPPS8E9" role="3clF45" />
+      <node concept="3clFbS" id="5DSQNPPS8Ea" role="3clF47">
+        <node concept="2Hmddi" id="27bTNFfbxnq" role="3cqZAp">
+          <node concept="2OqwBi" id="27bTNFfbxnr" role="2Hmdds">
+            <node concept="2YIFZM" id="27bTNFfbxns" role="2Oq$k0">
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
+              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <node concept="2OqwBi" id="27bTNFfc3Qp" role="37wK5m">
+                <node concept="2WthIp" id="27bTNFfc3Qq" role="2Oq$k0" />
+                <node concept="2XshWL" id="27bTNFfc3Qr" role="2OqNvi">
+                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
+                  <node concept="2tJFMh" id="27bTNFfc3Qs" role="2XxRq1">
+                    <node concept="ZC_QK" id="27bTNFfc3Qt" role="2tJFKM">
+                      <ref role="2aWVGs" to="wqtl:3yhgKRJ29Qs" resolve="Variance" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1jxXqW" id="27bTNFfc3So" role="37wK5m" />
+            </node>
+            <node concept="liA8E" id="27bTNFfbxnv" role="2OqNvi">
+              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3uibUv" id="4BHjwwGPB3e" role="Sfmx6">
+        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
+      </node>
+    </node>
+    <node concept="1LZb2c" id="19nQ_7V2D9U" role="1SL9yI">
+      <property role="TrG5h" value="Recursion" />
+      <node concept="3cqZAl" id="19nQ_7V2D9V" role="3clF45" />
+      <node concept="3clFbS" id="19nQ_7V2D9W" role="3clF47">
+        <node concept="2Hmddi" id="27bTNFfbxnW" role="3cqZAp">
+          <node concept="2OqwBi" id="27bTNFfbxnX" role="2Hmdds">
+            <node concept="2YIFZM" id="27bTNFfbxnY" role="2Oq$k0">
+              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
+              <node concept="2OqwBi" id="27bTNFfc3Uf" role="37wK5m">
+                <node concept="2WthIp" id="27bTNFfc3Ug" role="2Oq$k0" />
+                <node concept="2XshWL" id="27bTNFfc3Uh" role="2OqNvi">
+                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
+                  <node concept="2tJFMh" id="27bTNFfc3Ui" role="2XxRq1">
+                    <node concept="ZC_QK" id="27bTNFfc3Uj" role="2tJFKM">
+                      <ref role="2aWVGs" to="wqtl:7w387SKGv4P" resolve="Recursion" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1jxXqW" id="27bTNFfc3We" role="37wK5m" />
+            </node>
+            <node concept="liA8E" id="27bTNFfbxo1" role="2OqNvi">
+              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3uibUv" id="19nQ_7V2Dal" role="Sfmx6">
+        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
+      </node>
+    </node>
+    <node concept="1LZb2c" id="1TH_SRmLuzi" role="1SL9yI">
+      <property role="TrG5h" value="Bounds" />
+      <node concept="3cqZAl" id="1TH_SRmLuzj" role="3clF45" />
+      <node concept="3clFbS" id="1TH_SRmLuzk" role="3clF47">
+        <node concept="2Hmddi" id="1TH_SRmLuzl" role="3cqZAp">
+          <node concept="2OqwBi" id="1TH_SRmLuzm" role="2Hmdds">
+            <node concept="2YIFZM" id="1TH_SRmLuzn" role="2Oq$k0">
+              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
+              <node concept="2OqwBi" id="1TH_SRmLuzo" role="37wK5m">
+                <node concept="2WthIp" id="1TH_SRmLuzp" role="2Oq$k0" />
+                <node concept="2XshWL" id="1TH_SRmLuzq" role="2OqNvi">
+                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
+                  <node concept="2tJFMh" id="1TH_SRmLuzr" role="2XxRq1">
+                    <node concept="ZC_QK" id="1TH_SRmLvZX" role="2tJFKM">
+                      <ref role="2aWVGs" to="wqtl:1TH_SRmEWFy" resolve="Bounds" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1jxXqW" id="1TH_SRmLuzt" role="37wK5m" />
+            </node>
+            <node concept="liA8E" id="1TH_SRmLuzu" role="2OqNvi">
+              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3uibUv" id="1TH_SRmLuzv" role="Sfmx6">
+        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
+      </node>
+    </node>
   </node>
 </model>
 
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.incrementalBL@tests.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.incremental@tests.mps
similarity index 99%
rename from samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.incrementalBL@tests.mps
rename to samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.incremental@tests.mps
index 88f33588..94c3a361 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.incrementalBL@tests.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.incremental@tests.mps
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:8d367edf-0e3f-479f-8b0f-bd4f712af3fc(typechecking.samples.baseLanguage.incrementalBL@tests)">
+<model ref="r:8d22f6d9-72f0-49ec-92ee-027a87fbedd4(jetbrains.mps.baseLanguageExt.test.incremental@tests)">
   <persistence version="9" />
   <languages>
     <use id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test" version="5" />
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/codeAnal@tests.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.thinlet@tests.mps
similarity index 98%
rename from samples/mpscore/solutions/typechecking.samples.baseLanguage/models/codeAnal@tests.mps
rename to samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.thinlet@tests.mps
index 342ec56b..5341fc4d 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/codeAnal@tests.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguageExt.test/models/jetbrains.mps.baseLanguageExt.test.thinlet@tests.mps
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:89f58693-874d-4459-b352-b95efabcc527(typechecking.samples.baseLanguage.codeAnal@tests)">
+<model ref="r:c6049a37-e654-4a02-85d3-76247a0085db(jetbrains.mps.baseLanguageExt.test.thinlet@tests)">
   <persistence version="9" />
   <languages>
     <use id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test" version="5" />
@@ -13,9 +13,9 @@
     <use id="760a0a8c-eabb-4521-8bfd-65db761a9ba3" name="jetbrains.mps.baseLanguage.logging" version="0" />
   </languages>
   <imports>
-    <import index="hwt6" ref="r:1f3a7853-f20c-4f91-9912-5e82d9d1651a(typechecking.samples.baseLanguage.codeAnal)" />
     <import index="tpee" ref="r:00000000-0000-4000-0000-011c895902ca(jetbrains.mps.baseLanguage.structure)" />
     <import index="tj24" ref="r:0fbbb63a-fd15-46e1-8136-78049f6d6e63(jetbrains.mps.coderules.typechecking.service)" />
+    <import index="bm3g" ref="r:a3cbed52-2cb3-4f5f-bddd-c7d6bae97d47(jetbrains.mps.baseLanguageExt.test.code.thinlet)" />
     <import index="z1c3" ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea/java:jetbrains.mps.project(MPS.Core/)" implicit="true" />
     <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" implicit="true" />
   </imports>
@@ -170,7 +170,7 @@
     <property role="2XOHcw" value="${mpscore_home}" />
   </node>
   <node concept="1lH9Xt" id="1N_0WA5DT3k">
-    <property role="TrG5h" value="Huge" />
+    <property role="TrG5h" value="Thinlet" />
     <property role="3OwPAg" value="true" />
     <node concept="2XrIbr" id="35YJGAJTxCf" role="1qtyYc">
       <property role="TrG5h" value="resolve" />
@@ -252,7 +252,7 @@
                       <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
                       <node concept="2tJFMh" id="27bTNFfc4bv" role="2XxRq1">
                         <node concept="ZC_QK" id="27bTNFfc4bw" role="2tJFKM">
-                          <ref role="2aWVGs" to="hwt6:3489cc5$luO" resolve="Thinlet" />
+                          <ref role="2aWVGs" to="bm3g:3489cc5$luO" resolve="Thinlet" />
                         </node>
                       </node>
                     </node>
diff --git a/samples/mpscore/solutions/samples.mpscore.build/models/samples.mpscore.build.mps b/samples/mpscore/solutions/samples.mpscore.build/models/samples.mpscore.build.mps
index 2eb48c96..127f3196 100644
--- a/samples/mpscore/solutions/samples.mpscore.build/models/samples.mpscore.build.mps
+++ b/samples/mpscore/solutions/samples.mpscore.build/models/samples.mpscore.build.mps
@@ -321,6 +321,16 @@
             <ref role="3bR37D" to="zqd8:65DJywFj0Fi" resolve="jetbrains.mps.coderules.typechecking" />
           </node>
         </node>
+        <node concept="1SiIV0" id="1TH_SRmm_ca" role="3bR37C">
+          <node concept="3bR9La" id="1TH_SRmm_cb" role="1SiIV1">
+            <ref role="3bR37D" to="ffeo:7Kfy9QB6Lc2" resolve="jetbrains.mps.lang.typesystem" />
+          </node>
+        </node>
+        <node concept="1SiIV0" id="1TH_SRmm_cc" role="3bR37C">
+          <node concept="3bR9La" id="1TH_SRmm_cd" role="1SiIV1">
+            <ref role="3bR37D" to="zqd8:7mB3viLwG3m" resolve="jetbrains.mps.coderules.typechecking.test" />
+          </node>
+        </node>
       </node>
       <node concept="1E1JtA" id="69UmpDmJW3w" role="2G$12L">
         <property role="TrG5h" value="typechecking.samples.baseLanguage" />
@@ -383,6 +393,11 @@
             <ref role="3bR37D" to="ffeo:7Kfy9QB6Lc2" resolve="jetbrains.mps.lang.typesystem" />
           </node>
         </node>
+        <node concept="1SiIV0" id="1TH_SRmm_ce" role="3bR37C">
+          <node concept="3bR9La" id="1TH_SRmm_cf" role="1SiIV1">
+            <ref role="3bR37D" node="69UmpDmJW8I" resolve="jetbrains.mps.baseLanguageExt.test" />
+          </node>
+        </node>
       </node>
     </node>
     <node concept="22LTRH" id="69UmpDmJWeu" role="1hWBAP">
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/bounds.bad@tests.mps b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/bounds.bad@tests.mps
deleted file mode 100644
index 0280614f..00000000
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/bounds.bad@tests.mps
+++ /dev/null
@@ -1,308 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:824b7f7a-36f1-4ceb-b9c5-4f2330a84b68(typechecking.samples.baseLanguage.bounds.bad@tests)">
-  <persistence version="9" />
-  <languages>
-    <use id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test" version="5" />
-    <use id="f61473f9-130f-42f6-b98d-6c438812c2f6" name="jetbrains.mps.baseLanguage.unitTest" version="1" />
-    <use id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage" version="9" />
-    <use id="7866978e-a0f0-4cc7-81bc-4d213d9375e1" name="jetbrains.mps.lang.smodel" version="17" />
-    <use id="63650c59-16c8-498a-99c8-005c7ee9515d" name="jetbrains.mps.lang.access" version="0" />
-  </languages>
-  <imports>
-    <import index="7rut" ref="r:b1bec7fa-733c-4182-bbd4-b266e3d7e6db(typechecking.samples.baseLanguage.bounds.bad)" />
-    <import index="tpee" ref="r:00000000-0000-4000-0000-011c895902ca(jetbrains.mps.baseLanguage.structure)" />
-    <import index="tj24" ref="r:0fbbb63a-fd15-46e1-8136-78049f6d6e63(jetbrains.mps.coderules.typechecking.service)" />
-    <import index="z1c3" ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea/java:jetbrains.mps.project(MPS.Core/)" implicit="true" />
-    <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" implicit="true" />
-  </imports>
-  <registry>
-    <language id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test">
-      <concept id="5097124989038916362" name="jetbrains.mps.lang.test.structure.TestInfo" flags="ng" index="2XOHcx">
-        <property id="5097124989038916363" name="projectPath" index="2XOHcw" />
-      </concept>
-      <concept id="1225467090849" name="jetbrains.mps.lang.test.structure.ProjectExpression" flags="nn" index="1jxXqW" />
-      <concept id="1216913645126" name="jetbrains.mps.lang.test.structure.NodesTestCase" flags="lg" index="1lH9Xt">
-        <property id="6339244025081158986" name="needsNoWriteAction" index="3OwPAg" />
-        <child id="1216993439383" name="methods" index="1qtyYc" />
-        <child id="1217501895093" name="testMethods" index="1SL9yI" />
-      </concept>
-      <concept id="1225978065297" name="jetbrains.mps.lang.test.structure.SimpleNodeTest" flags="ng" index="1LZb2c" />
-    </language>
-    <language id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage">
-      <concept id="1215693861676" name="jetbrains.mps.baseLanguage.structure.BaseAssignmentExpression" flags="nn" index="d038R">
-        <child id="1068498886297" name="rValue" index="37vLTx" />
-        <child id="1068498886295" name="lValue" index="37vLTJ" />
-      </concept>
-      <concept id="1202948039474" name="jetbrains.mps.baseLanguage.structure.InstanceMethodCallOperation" flags="nn" index="liA8E" />
-      <concept id="1197027756228" name="jetbrains.mps.baseLanguage.structure.DotExpression" flags="nn" index="2OqwBi">
-        <child id="1197027771414" name="operand" index="2Oq$k0" />
-        <child id="1197027833540" name="operation" index="2OqNvi" />
-      </concept>
-      <concept id="1081236700937" name="jetbrains.mps.baseLanguage.structure.StaticMethodCall" flags="nn" index="2YIFZM">
-        <reference id="1144433194310" name="classConcept" index="1Pybhc" />
-      </concept>
-      <concept id="1068498886296" name="jetbrains.mps.baseLanguage.structure.VariableReference" flags="nn" index="37vLTw">
-        <reference id="1068581517664" name="variableDeclaration" index="3cqZAo" />
-      </concept>
-      <concept id="1068498886292" name="jetbrains.mps.baseLanguage.structure.ParameterDeclaration" flags="ir" index="37vLTG" />
-      <concept id="1068498886294" name="jetbrains.mps.baseLanguage.structure.AssignmentExpression" flags="nn" index="37vLTI" />
-      <concept id="4972933694980447171" name="jetbrains.mps.baseLanguage.structure.BaseVariableDeclaration" flags="ng" index="19Szcq">
-        <child id="5680397130376446158" name="type" index="1tU5fm" />
-      </concept>
-      <concept id="1068580123132" name="jetbrains.mps.baseLanguage.structure.BaseMethodDeclaration" flags="ng" index="3clF44">
-        <child id="1164879685961" name="throwsItem" index="Sfmx6" />
-        <child id="1068580123133" name="returnType" index="3clF45" />
-        <child id="1068580123134" name="parameter" index="3clF46" />
-        <child id="1068580123135" name="body" index="3clF47" />
-      </concept>
-      <concept id="1068580123155" name="jetbrains.mps.baseLanguage.structure.ExpressionStatement" flags="nn" index="3clFbF">
-        <child id="1068580123156" name="expression" index="3clFbG" />
-      </concept>
-      <concept id="1068580123136" name="jetbrains.mps.baseLanguage.structure.StatementList" flags="sn" stub="5293379017992965193" index="3clFbS">
-        <child id="1068581517665" name="statement" index="3cqZAp" />
-      </concept>
-      <concept id="1068581242864" name="jetbrains.mps.baseLanguage.structure.LocalVariableDeclarationStatement" flags="nn" index="3cpWs8">
-        <child id="1068581242865" name="localVariableDeclaration" index="3cpWs9" />
-      </concept>
-      <concept id="1068581242863" name="jetbrains.mps.baseLanguage.structure.LocalVariableDeclaration" flags="nr" index="3cpWsn" />
-      <concept id="1068581517677" name="jetbrains.mps.baseLanguage.structure.VoidType" flags="in" index="3cqZAl" />
-      <concept id="1204053956946" name="jetbrains.mps.baseLanguage.structure.IMethodCall" flags="ng" index="1ndlxa">
-        <reference id="1068499141037" name="baseMethodDeclaration" index="37wK5l" />
-        <child id="1068499141038" name="actualArgument" index="37wK5m" />
-      </concept>
-      <concept id="1107535904670" name="jetbrains.mps.baseLanguage.structure.ClassifierType" flags="in" index="3uibUv">
-        <reference id="1107535924139" name="classifier" index="3uigEE" />
-      </concept>
-      <concept id="1178549954367" name="jetbrains.mps.baseLanguage.structure.IVisible" flags="ng" index="1B3ioH">
-        <child id="1178549979242" name="visibility" index="1B3o_S" />
-      </concept>
-      <concept id="1146644623116" name="jetbrains.mps.baseLanguage.structure.PrivateVisibility" flags="nn" index="3Tm6S6" />
-    </language>
-    <language id="63650c59-16c8-498a-99c8-005c7ee9515d" name="jetbrains.mps.lang.access">
-      <concept id="8974276187400348173" name="jetbrains.mps.lang.access.structure.CommandClosureLiteral" flags="nn" index="1QHqEC" />
-      <concept id="8974276187400348170" name="jetbrains.mps.lang.access.structure.BaseExecuteCommandStatement" flags="nn" index="1QHqEJ">
-        <child id="1423104411234567454" name="repo" index="ukAjM" />
-        <child id="8974276187400348171" name="commandClosureLiteral" index="1QHqEI" />
-      </concept>
-      <concept id="8974276187400348181" name="jetbrains.mps.lang.access.structure.ExecuteLightweightCommandStatement" flags="nn" index="1QHqEK" />
-    </language>
-    <language id="fd392034-7849-419d-9071-12563d152375" name="jetbrains.mps.baseLanguage.closures">
-      <concept id="1199569711397" name="jetbrains.mps.baseLanguage.closures.structure.ClosureLiteral" flags="nn" index="1bVj0M">
-        <child id="1199569916463" name="body" index="1bW5cS" />
-      </concept>
-    </language>
-    <language id="443f4c36-fcf5-4eb6-9500-8d06ed259e3e" name="jetbrains.mps.baseLanguage.classifiers">
-      <concept id="1205752633985" name="jetbrains.mps.baseLanguage.classifiers.structure.ThisClassifierExpression" flags="nn" index="2WthIp" />
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-      <concept id="2396822768958367367" name="jetbrains.mps.lang.smodel.structure.AbstractTypeCastExpression" flags="nn" index="$5XWr">
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-      <concept id="1140137987495" name="jetbrains.mps.lang.smodel.structure.SNodeTypeCastExpression" flags="nn" index="1PxgMI" />
-      <concept id="1138055754698" name="jetbrains.mps.lang.smodel.structure.SNodeType" flags="in" index="3Tqbb2">
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-    <language id="ceab5195-25ea-4f22-9b92-103b95ca8c0c" name="jetbrains.mps.lang.core">
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-        <property id="1169194664001" name="name" index="TrG5h" />
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-    <property role="3OwPAg" value="true" />
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-                          <node concept="liA8E" id="35YJGAJT$3d" role="2OqNvi">
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-                      <ref role="2aWVGs" to="7rut:5Pqb1qkLdNZ" resolve="Sample_bad3" />
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-            <node concept="liA8E" id="5Pqb1qkLo$9" role="2OqNvi">
-              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
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-      <node concept="3uibUv" id="5Pqb1qkLo$a" role="Sfmx6">
-        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
-      </node>
-    </node>
-  </node>
-  <node concept="2XOHcx" id="1N_0WA5DT60">
-    <property role="2XOHcw" value="${mpscore_home}" />
-  </node>
-</model>
-
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/bounds@tests.mps b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/bounds@tests.mps
index 00cb0ba3..90b32061 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/bounds@tests.mps
+++ b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/bounds@tests.mps
@@ -271,128 +271,38 @@
         <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
       </node>
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       <property role="TrG5h" value="Variance" />
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               <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
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+                <node concept="2WthIp" id="1TH_SRmNb8E" role="2Oq$k0" />
+                <node concept="2XshWL" id="1TH_SRmNb8F" role="2OqNvi">
                   <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
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-                    <node concept="ZC_QK" id="27bTNFfc3Qt" role="2tJFKM">
+                  <node concept="2tJFMh" id="1TH_SRmNb8G" role="2XxRq1">
+                    <node concept="ZC_QK" id="1TH_SRmNcwm" role="2tJFKM">
                       <ref role="2aWVGs" to="f6t6:3yhgKRJ29Qs" resolve="Variance" />
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               <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
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-        <node concept="2Hmddi" id="2PEDwPSdjJk" role="3cqZAp">
-          <node concept="2OqwBi" id="2PEDwPSdjJl" role="2Hmdds">
-            <node concept="2YIFZM" id="2PEDwPSdjJm" role="2Oq$k0">
-              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
-              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
-              <node concept="2OqwBi" id="2PEDwPSdjJn" role="37wK5m">
-                <node concept="2WthIp" id="2PEDwPSdjJo" role="2Oq$k0" />
-                <node concept="2XshWL" id="2PEDwPSdjJp" role="2OqNvi">
-                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
-                  <node concept="2tJFMh" id="2PEDwPSdjJq" role="2XxRq1">
-                    <node concept="ZC_QK" id="2PEDwPSdkaa" role="2tJFKM">
-                      <ref role="2aWVGs" to="f6t6:2PEDwPSdaaD" resolve="Containment" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-              <node concept="1jxXqW" id="2PEDwPSdjJs" role="37wK5m" />
-            </node>
-            <node concept="liA8E" id="2PEDwPSdjJt" role="2OqNvi">
-              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
-            </node>
-          </node>
-        </node>
-      </node>
-    </node>
   </node>
   <node concept="2XOHcx" id="1N_0WA5DT60">
     <property role="2XOHcw" value="${mpscore_home}" />
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/helloWorld@tests.mps b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/helloWorld@tests.mps
index b572ba93..5a7ab18f 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/helloWorld@tests.mps
+++ b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/helloWorld@tests.mps
@@ -270,6 +270,70 @@
         <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
       </node>
     </node>
+    <node concept="1LZb2c" id="1TH_SRmNfU6" role="1SL9yI">
+      <property role="TrG5h" value="TestSubclassing" />
+      <node concept="3cqZAl" id="1TH_SRmNfU7" role="3clF45" />
+      <node concept="3clFbS" id="1TH_SRmNfU8" role="3clF47">
+        <node concept="2Hmddi" id="1TH_SRmNfU9" role="3cqZAp">
+          <node concept="2OqwBi" id="1TH_SRmNfUa" role="2Hmdds">
+            <node concept="2YIFZM" id="1TH_SRmNfUb" role="2Oq$k0">
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
+              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <node concept="2OqwBi" id="1TH_SRmNfUc" role="37wK5m">
+                <node concept="2WthIp" id="1TH_SRmNfUd" role="2Oq$k0" />
+                <node concept="2XshWL" id="1TH_SRmNfUe" role="2OqNvi">
+                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
+                  <node concept="2tJFMh" id="1TH_SRmNfUf" role="2XxRq1">
+                    <node concept="ZC_QK" id="1TH_SRmNgAr" role="2tJFKM">
+                      <ref role="2aWVGs" to="bs09:4M5CNSfDyo1" resolve="Subclassing" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1jxXqW" id="1TH_SRmNfUh" role="37wK5m" />
+            </node>
+            <node concept="liA8E" id="1TH_SRmNfUi" role="2OqNvi">
+              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3uibUv" id="1TH_SRmNfUj" role="Sfmx6">
+        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
+      </node>
+    </node>
+    <node concept="1LZb2c" id="1TH_SRmNgFv" role="1SL9yI">
+      <property role="TrG5h" value="TestScopes" />
+      <node concept="3cqZAl" id="1TH_SRmNgFw" role="3clF45" />
+      <node concept="3clFbS" id="1TH_SRmNgFx" role="3clF47">
+        <node concept="2Hmddi" id="1TH_SRmNgFy" role="3cqZAp">
+          <node concept="2OqwBi" id="1TH_SRmNgFz" role="2Hmdds">
+            <node concept="2YIFZM" id="1TH_SRmNgF$" role="2Oq$k0">
+              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
+              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
+              <node concept="2OqwBi" id="1TH_SRmNgF_" role="37wK5m">
+                <node concept="2WthIp" id="1TH_SRmNgFA" role="2Oq$k0" />
+                <node concept="2XshWL" id="1TH_SRmNgFB" role="2OqNvi">
+                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
+                  <node concept="2tJFMh" id="1TH_SRmNgFC" role="2XxRq1">
+                    <node concept="ZC_QK" id="1TH_SRmNhoG" role="2tJFKM">
+                      <ref role="2aWVGs" to="bs09:4pwDyRBUfJN" resolve="Scopes" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1jxXqW" id="1TH_SRmNgFE" role="37wK5m" />
+            </node>
+            <node concept="liA8E" id="1TH_SRmNgFF" role="2OqNvi">
+              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3uibUv" id="1TH_SRmNgFG" role="Sfmx6">
+        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
+      </node>
+    </node>
   </node>
 </model>
 
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/simpleGenerics@tests.mps b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/simpleGenerics@tests.mps
deleted file mode 100644
index 5585a50f..00000000
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/simpleGenerics@tests.mps
+++ /dev/null
@@ -1,275 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:eff88867-8c71-468f-947b-72ebaca06455(typechecking.samples.baseLanguage.simpleGenerics@tests)">
-  <persistence version="9" />
-  <languages>
-    <use id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test" version="5" />
-    <use id="f61473f9-130f-42f6-b98d-6c438812c2f6" name="jetbrains.mps.baseLanguage.unitTest" version="1" />
-    <use id="7866978e-a0f0-4cc7-81bc-4d213d9375e1" name="jetbrains.mps.lang.smodel" version="17" />
-    <use id="63650c59-16c8-498a-99c8-005c7ee9515d" name="jetbrains.mps.lang.access" version="0" />
-  </languages>
-  <imports>
-    <import index="tpee" ref="r:00000000-0000-4000-0000-011c895902ca(jetbrains.mps.baseLanguage.structure)" />
-    <import index="waaz" ref="r:5669dd77-177e-474f-8fb2-c015a8eb4306(typechecking.samples.baseLanguage.simpleGenerics)" />
-    <import index="tj24" ref="r:0fbbb63a-fd15-46e1-8136-78049f6d6e63(jetbrains.mps.coderules.typechecking.service)" />
-    <import index="z1c3" ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea/java:jetbrains.mps.project(MPS.Core/)" implicit="true" />
-    <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" implicit="true" />
-  </imports>
-  <registry>
-    <language id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test">
-      <concept id="5097124989038916362" name="jetbrains.mps.lang.test.structure.TestInfo" flags="ng" index="2XOHcx">
-        <property id="5097124989038916363" name="projectPath" index="2XOHcw" />
-      </concept>
-      <concept id="1225467090849" name="jetbrains.mps.lang.test.structure.ProjectExpression" flags="nn" index="1jxXqW" />
-      <concept id="1216913645126" name="jetbrains.mps.lang.test.structure.NodesTestCase" flags="lg" index="1lH9Xt">
-        <property id="6339244025081158986" name="needsNoWriteAction" index="3OwPAg" />
-        <child id="1216993439383" name="methods" index="1qtyYc" />
-        <child id="1217501895093" name="testMethods" index="1SL9yI" />
-      </concept>
-      <concept id="1225978065297" name="jetbrains.mps.lang.test.structure.SimpleNodeTest" flags="ng" index="1LZb2c" />
-    </language>
-    <language id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage">
-      <concept id="1215693861676" name="jetbrains.mps.baseLanguage.structure.BaseAssignmentExpression" flags="nn" index="d038R">
-        <child id="1068498886297" name="rValue" index="37vLTx" />
-        <child id="1068498886295" name="lValue" index="37vLTJ" />
-      </concept>
-      <concept id="1202948039474" name="jetbrains.mps.baseLanguage.structure.InstanceMethodCallOperation" flags="nn" index="liA8E" />
-      <concept id="1197027756228" name="jetbrains.mps.baseLanguage.structure.DotExpression" flags="nn" index="2OqwBi">
-        <child id="1197027771414" name="operand" index="2Oq$k0" />
-        <child id="1197027833540" name="operation" index="2OqNvi" />
-      </concept>
-      <concept id="1081236700937" name="jetbrains.mps.baseLanguage.structure.StaticMethodCall" flags="nn" index="2YIFZM">
-        <reference id="1144433194310" name="classConcept" index="1Pybhc" />
-      </concept>
-      <concept id="1068498886296" name="jetbrains.mps.baseLanguage.structure.VariableReference" flags="nn" index="37vLTw">
-        <reference id="1068581517664" name="variableDeclaration" index="3cqZAo" />
-      </concept>
-      <concept id="1068498886292" name="jetbrains.mps.baseLanguage.structure.ParameterDeclaration" flags="ir" index="37vLTG" />
-      <concept id="1068498886294" name="jetbrains.mps.baseLanguage.structure.AssignmentExpression" flags="nn" index="37vLTI" />
-      <concept id="4972933694980447171" name="jetbrains.mps.baseLanguage.structure.BaseVariableDeclaration" flags="ng" index="19Szcq">
-        <child id="5680397130376446158" name="type" index="1tU5fm" />
-      </concept>
-      <concept id="1068580123132" name="jetbrains.mps.baseLanguage.structure.BaseMethodDeclaration" flags="ng" index="3clF44">
-        <child id="1164879685961" name="throwsItem" index="Sfmx6" />
-        <child id="1068580123133" name="returnType" index="3clF45" />
-        <child id="1068580123134" name="parameter" index="3clF46" />
-        <child id="1068580123135" name="body" index="3clF47" />
-      </concept>
-      <concept id="1068580123155" name="jetbrains.mps.baseLanguage.structure.ExpressionStatement" flags="nn" index="3clFbF">
-        <child id="1068580123156" name="expression" index="3clFbG" />
-      </concept>
-      <concept id="1068580123136" name="jetbrains.mps.baseLanguage.structure.StatementList" flags="sn" stub="5293379017992965193" index="3clFbS">
-        <child id="1068581517665" name="statement" index="3cqZAp" />
-      </concept>
-      <concept id="1068581242864" name="jetbrains.mps.baseLanguage.structure.LocalVariableDeclarationStatement" flags="nn" index="3cpWs8">
-        <child id="1068581242865" name="localVariableDeclaration" index="3cpWs9" />
-      </concept>
-      <concept id="1068581242863" name="jetbrains.mps.baseLanguage.structure.LocalVariableDeclaration" flags="nr" index="3cpWsn" />
-      <concept id="1068581517677" name="jetbrains.mps.baseLanguage.structure.VoidType" flags="in" index="3cqZAl" />
-      <concept id="1204053956946" name="jetbrains.mps.baseLanguage.structure.IMethodCall" flags="ng" index="1ndlxa">
-        <reference id="1068499141037" name="baseMethodDeclaration" index="37wK5l" />
-        <child id="1068499141038" name="actualArgument" index="37wK5m" />
-      </concept>
-      <concept id="1107535904670" name="jetbrains.mps.baseLanguage.structure.ClassifierType" flags="in" index="3uibUv">
-        <reference id="1107535924139" name="classifier" index="3uigEE" />
-      </concept>
-      <concept id="1178549954367" name="jetbrains.mps.baseLanguage.structure.IVisible" flags="ng" index="1B3ioH">
-        <child id="1178549979242" name="visibility" index="1B3o_S" />
-      </concept>
-      <concept id="1146644623116" name="jetbrains.mps.baseLanguage.structure.PrivateVisibility" flags="nn" index="3Tm6S6" />
-    </language>
-    <language id="63650c59-16c8-498a-99c8-005c7ee9515d" name="jetbrains.mps.lang.access">
-      <concept id="8974276187400348173" name="jetbrains.mps.lang.access.structure.CommandClosureLiteral" flags="nn" index="1QHqEC" />
-      <concept id="8974276187400348170" name="jetbrains.mps.lang.access.structure.BaseExecuteCommandStatement" flags="nn" index="1QHqEJ">
-        <child id="1423104411234567454" name="repo" index="ukAjM" />
-        <child id="8974276187400348171" name="commandClosureLiteral" index="1QHqEI" />
-      </concept>
-      <concept id="8974276187400348181" name="jetbrains.mps.lang.access.structure.ExecuteLightweightCommandStatement" flags="nn" index="1QHqEK" />
-    </language>
-    <language id="fd392034-7849-419d-9071-12563d152375" name="jetbrains.mps.baseLanguage.closures">
-      <concept id="1199569711397" name="jetbrains.mps.baseLanguage.closures.structure.ClosureLiteral" flags="nn" index="1bVj0M">
-        <child id="1199569916463" name="body" index="1bW5cS" />
-      </concept>
-    </language>
-    <language id="443f4c36-fcf5-4eb6-9500-8d06ed259e3e" name="jetbrains.mps.baseLanguage.classifiers">
-      <concept id="1205752633985" name="jetbrains.mps.baseLanguage.classifiers.structure.ThisClassifierExpression" flags="nn" index="2WthIp" />
-      <concept id="1205756064662" name="jetbrains.mps.baseLanguage.classifiers.structure.IMemberOperation" flags="ng" index="2WEnae">
-        <reference id="1205756909548" name="member" index="2WH_rO" />
-      </concept>
-      <concept id="1205769003971" name="jetbrains.mps.baseLanguage.classifiers.structure.DefaultClassifierMethodDeclaration" flags="ng" index="2XrIbr" />
-      <concept id="1205769149993" name="jetbrains.mps.baseLanguage.classifiers.structure.DefaultClassifierMethodCallOperation" flags="nn" index="2XshWL">
-        <child id="1205770614681" name="actualArgument" index="2XxRq1" />
-      </concept>
-    </language>
-    <language id="446c26eb-2b7b-4bf0-9b35-f83fa582753e" name="jetbrains.mps.lang.modelapi">
-      <concept id="4733039728785194814" name="jetbrains.mps.lang.modelapi.structure.NamedNodeReference" flags="ng" index="ZC_QK">
-        <reference id="7256306938026143658" name="target" index="2aWVGs" />
-      </concept>
-    </language>
-    <language id="f61473f9-130f-42f6-b98d-6c438812c2f6" name="jetbrains.mps.baseLanguage.unitTest">
-      <concept id="7080278351417106679" name="jetbrains.mps.baseLanguage.unitTest.structure.AssertIsNotNull" flags="nn" index="2Hmddi">
-        <child id="7080278351417106681" name="expression" index="2Hmdds" />
-      </concept>
-    </language>
-    <language id="7866978e-a0f0-4cc7-81bc-4d213d9375e1" name="jetbrains.mps.lang.smodel">
-      <concept id="1177026924588" name="jetbrains.mps.lang.smodel.structure.RefConcept_Reference" flags="nn" index="chp4Y">
-        <reference id="1177026940964" name="conceptDeclaration" index="cht4Q" />
-      </concept>
-      <concept id="7400021826771268254" name="jetbrains.mps.lang.smodel.structure.SNodePointerType" flags="ig" index="2sp9CU" />
-      <concept id="7400021826774799413" name="jetbrains.mps.lang.smodel.structure.NodePointerExpression" flags="ng" index="2tJFMh">
-        <child id="7400021826774799510" name="ref" index="2tJFKM" />
-      </concept>
-      <concept id="4065387505485742749" name="jetbrains.mps.lang.smodel.structure.AbstractPointerResolveOperation" flags="ng" index="2yCiFS">
-        <child id="3648723375513868575" name="repositoryArg" index="Vysub" />
-      </concept>
-      <concept id="2396822768958367367" name="jetbrains.mps.lang.smodel.structure.AbstractTypeCastExpression" flags="nn" index="$5XWr">
-        <child id="6733348108486823193" name="leftExpression" index="1m5AlR" />
-        <child id="3906496115198199033" name="conceptArgument" index="3oSUPX" />
-      </concept>
-      <concept id="3648723375513868532" name="jetbrains.mps.lang.smodel.structure.NodePointer_ResolveOperation" flags="ng" index="Vyspw" />
-      <concept id="1140137987495" name="jetbrains.mps.lang.smodel.structure.SNodeTypeCastExpression" flags="nn" index="1PxgMI" />
-      <concept id="1138055754698" name="jetbrains.mps.lang.smodel.structure.SNodeType" flags="in" index="3Tqbb2">
-        <reference id="1138405853777" name="concept" index="ehGHo" />
-      </concept>
-    </language>
-    <language id="ceab5195-25ea-4f22-9b92-103b95ca8c0c" name="jetbrains.mps.lang.core">
-      <concept id="1169194658468" name="jetbrains.mps.lang.core.structure.INamedConcept" flags="ng" index="TrEIO">
-        <property id="1169194664001" name="name" index="TrG5h" />
-      </concept>
-    </language>
-  </registry>
-  <node concept="2XOHcx" id="1N_0WA5DT60">
-    <property role="2XOHcw" value="${mpscore_home}" />
-  </node>
-  <node concept="1lH9Xt" id="1N_0WA5DT3k">
-    <property role="TrG5h" value="Typechecking" />
-    <property role="3OwPAg" value="true" />
-    <node concept="2XrIbr" id="35YJGAJTxCf" role="1qtyYc">
-      <property role="TrG5h" value="resolve" />
-      <node concept="37vLTG" id="35YJGAJTxCF" role="3clF46">
-        <property role="TrG5h" value="ref" />
-        <node concept="2sp9CU" id="35YJGAJTxCR" role="1tU5fm" />
-      </node>
-      <node concept="3Tqbb2" id="35YJGAJTxCp" role="3clF45">
-        <ref role="ehGHo" to="tpee:g7pOWCK" resolve="Classifier" />
-      </node>
-      <node concept="3clFbS" id="35YJGAJTxCh" role="3clF47">
-        <node concept="3cpWs8" id="35YJGAJT$34" role="3cqZAp">
-          <node concept="3cpWsn" id="35YJGAJT$35" role="3cpWs9">
-            <property role="TrG5h" value="cls" />
-            <node concept="3Tqbb2" id="35YJGAJT$2Z" role="1tU5fm">
-              <ref role="ehGHo" to="tpee:g7pOWCK" resolve="Classifier" />
-            </node>
-          </node>
-        </node>
-        <node concept="1QHqEK" id="35YJGAJTxLm" role="3cqZAp">
-          <node concept="1QHqEC" id="35YJGAJTxLn" role="1QHqEI">
-            <node concept="3clFbS" id="35YJGAJTxLo" role="1bW5cS">
-              <node concept="3clFbF" id="35YJGAJT$eE" role="3cqZAp">
-                <node concept="37vLTI" id="35YJGAJT$eG" role="3clFbG">
-                  <node concept="1PxgMI" id="35YJGAJT$36" role="37vLTx">
-                    <node concept="chp4Y" id="35YJGAJT$37" role="3oSUPX">
-                      <ref role="cht4Q" to="tpee:g7pOWCK" resolve="Classifier" />
-                    </node>
-                    <node concept="2OqwBi" id="35YJGAJT$38" role="1m5AlR">
-                      <node concept="37vLTw" id="35YJGAJT$39" role="2Oq$k0">
-                        <ref role="3cqZAo" node="35YJGAJTxCF" resolve="ref" />
-                      </node>
-                      <node concept="Vyspw" id="35YJGAJT$3a" role="2OqNvi">
-                        <node concept="2OqwBi" id="35YJGAJT$3b" role="Vysub">
-                          <node concept="1jxXqW" id="35YJGAJT$3c" role="2Oq$k0" />
-                          <node concept="liA8E" id="35YJGAJT$3d" role="2OqNvi">
-                            <ref role="37wK5l" to="z1c3:~Project.getRepository()" resolve="getRepository" />
-                          </node>
-                        </node>
-                      </node>
-                    </node>
-                  </node>
-                  <node concept="37vLTw" id="35YJGAJT$eK" role="37vLTJ">
-                    <ref role="3cqZAo" node="35YJGAJT$35" resolve="cls" />
-                  </node>
-                </node>
-              </node>
-            </node>
-          </node>
-          <node concept="2OqwBi" id="35YJGAJTxW6" role="ukAjM">
-            <node concept="1jxXqW" id="35YJGAJTxLs" role="2Oq$k0" />
-            <node concept="liA8E" id="35YJGAJTy_W" role="2OqNvi">
-              <ref role="37wK5l" to="z1c3:~Project.getRepository()" resolve="getRepository" />
-            </node>
-          </node>
-        </node>
-        <node concept="3clFbF" id="35YJGAJTyJo" role="3cqZAp">
-          <node concept="37vLTw" id="35YJGAJT$3e" role="3clFbG">
-            <ref role="3cqZAo" node="35YJGAJT$35" resolve="cls" />
-          </node>
-        </node>
-      </node>
-      <node concept="3Tm6S6" id="35YJGAJTxCl" role="1B3o_S" />
-    </node>
-    <node concept="1LZb2c" id="1N_0WA5DT8G" role="1SL9yI">
-      <property role="TrG5h" value="SimpleGenerics" />
-      <node concept="3cqZAl" id="1N_0WA5DT8H" role="3clF45" />
-      <node concept="3clFbS" id="1N_0WA5DT8I" role="3clF47">
-        <node concept="2Hmddi" id="27bTNFfbxhc" role="3cqZAp">
-          <node concept="2OqwBi" id="27bTNFfbxhd" role="2Hmdds">
-            <node concept="2YIFZM" id="27bTNFfbxhe" role="2Oq$k0">
-              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
-              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
-              <node concept="2OqwBi" id="27bTNFfbX4L" role="37wK5m">
-                <node concept="2WthIp" id="27bTNFfbX4M" role="2Oq$k0" />
-                <node concept="2XshWL" id="27bTNFfbX4N" role="2OqNvi">
-                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
-                  <node concept="2tJFMh" id="27bTNFfbX4O" role="2XxRq1">
-                    <node concept="ZC_QK" id="27bTNFfbX4P" role="2tJFKM">
-                      <ref role="2aWVGs" to="waaz:3Qp4N06bAlL" resolve="SimpleGenerics" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-              <node concept="1jxXqW" id="27bTNFfbX6K" role="37wK5m" />
-            </node>
-            <node concept="liA8E" id="27bTNFfbxhh" role="2OqNvi">
-              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
-            </node>
-          </node>
-        </node>
-      </node>
-      <node concept="3uibUv" id="4BHjwwGPCTZ" role="Sfmx6">
-        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
-      </node>
-    </node>
-    <node concept="1LZb2c" id="1N_0WA5JFrN" role="1SL9yI">
-      <property role="TrG5h" value="SimpleGenerics2" />
-      <node concept="3cqZAl" id="1N_0WA5JFrO" role="3clF45" />
-      <node concept="3clFbS" id="1N_0WA5JFrP" role="3clF47">
-        <node concept="2Hmddi" id="27bTNFfbxhI" role="3cqZAp">
-          <node concept="2OqwBi" id="27bTNFfbxhJ" role="2Hmdds">
-            <node concept="2YIFZM" id="27bTNFfbxhK" role="2Oq$k0">
-              <ref role="37wK5l" to="tj24:27bTNFfaOo$" resolve="ofNode" />
-              <ref role="1Pybhc" to="tj24:1N_0WA5JxZO" resolve="TypecheckingTestHelper" />
-              <node concept="2OqwBi" id="27bTNFfbX8B" role="37wK5m">
-                <node concept="2WthIp" id="27bTNFfbX8C" role="2Oq$k0" />
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-                  <ref role="2WH_rO" node="35YJGAJTxCf" resolve="resolve" />
-                  <node concept="2tJFMh" id="27bTNFfbX8E" role="2XxRq1">
-                    <node concept="ZC_QK" id="27bTNFfbX8F" role="2tJFKM">
-                      <ref role="2aWVGs" to="waaz:623frvF_qs8" resolve="SimpleGenerics2" />
-                    </node>
-                  </node>
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-              <node concept="1jxXqW" id="27bTNFfbXaA" role="37wK5m" />
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-            <node concept="liA8E" id="27bTNFfbxhN" role="2OqNvi">
-              <ref role="37wK5l" to="tj24:27bTNFfaYS2" resolve="checkTypes" />
-            </node>
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-        </node>
-      </node>
-      <node concept="3uibUv" id="4BHjwwGPDri" role="Sfmx6">
-        <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
-      </node>
-    </node>
-  </node>
-</model>
-
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.bounds.bad.mps b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.bounds.bad.mps
index a89afb86..b9087528 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.bounds.bad.mps
+++ b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.bounds.bad.mps
@@ -1,43 +1,32 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:b1bec7fa-733c-4182-bbd4-b266e3d7e6db(typechecking.samples.baseLanguage.bounds.bad)" doNotGenerate="true">
+<model ref="r:b1bec7fa-733c-4182-bbd4-b266e3d7e6db(typechecking.samples.baseLanguage.bounds.bad)">
   <persistence version="9" />
   <languages>
     <use id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage" version="9" />
     <use id="0fda14cc-a416-4c81-869a-2175d8b3325d" name="jetbrains.mps.baseLanguageExt" version="0" />
     <use id="0b80a2e8-f9f1-47b3-823f-56eb115bca42" name="jetbrains.mps.typechecking.annotation" version="0" />
   </languages>
-  <imports>
-    <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" implicit="true" />
-  </imports>
+  <imports />
   <registry>
     <language id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage">
       <concept id="1202948039474" name="jetbrains.mps.baseLanguage.structure.InstanceMethodCallOperation" flags="nn" index="liA8E" />
       <concept id="1465982738277781862" name="jetbrains.mps.baseLanguage.structure.PlaceholderMember" flags="ng" index="2tJIrI" />
       <concept id="2820489544401957797" name="jetbrains.mps.baseLanguage.structure.DefaultClassCreator" flags="nn" index="HV5vD">
         <reference id="2820489544401957798" name="classifier" index="HV5vE" />
-        <child id="2820489544402271667" name="typeParameter" index="HU9BZ" />
       </concept>
       <concept id="1197027756228" name="jetbrains.mps.baseLanguage.structure.DotExpression" flags="nn" index="2OqwBi">
         <child id="1197027771414" name="operand" index="2Oq$k0" />
         <child id="1197027833540" name="operation" index="2OqNvi" />
       </concept>
-      <concept id="1197029447546" name="jetbrains.mps.baseLanguage.structure.FieldReferenceOperation" flags="nn" index="2OwXpG">
-        <reference id="1197029500499" name="fieldDeclaration" index="2Oxat5" />
-      </concept>
       <concept id="1145552977093" name="jetbrains.mps.baseLanguage.structure.GenericNewExpression" flags="nn" index="2ShNRf">
         <child id="1145553007750" name="creator" index="2ShVmc" />
       </concept>
       <concept id="1070475354124" name="jetbrains.mps.baseLanguage.structure.ThisExpression" flags="nn" index="Xjq3P" />
       <concept id="1070534058343" name="jetbrains.mps.baseLanguage.structure.NullLiteral" flags="nn" index="10Nm6u" />
-      <concept id="1068390468200" name="jetbrains.mps.baseLanguage.structure.FieldDeclaration" flags="ig" index="312cEg">
-        <property id="8606350594693632173" name="isTransient" index="eg7rD" />
-        <property id="1240249534625" name="isVolatile" index="34CwA1" />
-      </concept>
       <concept id="1068390468198" name="jetbrains.mps.baseLanguage.structure.ClassConcept" flags="ig" index="312cEu">
         <child id="1165602531693" name="superclass" index="1zkMxy" />
       </concept>
       <concept id="1068431474542" name="jetbrains.mps.baseLanguage.structure.VariableDeclaration" flags="ng" index="33uBYm">
-        <property id="1176718929932" name="isFinal" index="3TUv4t" />
         <child id="1068431790190" name="initializer" index="33vP2m" />
       </concept>
       <concept id="1109279763828" name="jetbrains.mps.baseLanguage.structure.TypeVariableDeclaration" flags="ng" index="16euLQ">
@@ -86,9 +75,6 @@
       <concept id="1171903862077" name="jetbrains.mps.baseLanguage.structure.LowerBoundType" flags="in" index="3qUtgH">
         <child id="1171903869531" name="bound" index="3qUvdb" />
       </concept>
-      <concept id="1171903916106" name="jetbrains.mps.baseLanguage.structure.UpperBoundType" flags="in" index="3qUE_q">
-        <child id="1171903916107" name="bound" index="3qUE_r" />
-      </concept>
       <concept id="1107535904670" name="jetbrains.mps.baseLanguage.structure.ClassifierType" flags="in" index="3uibUv">
         <reference id="1107535924139" name="classifier" index="3uigEE" />
         <child id="1109201940907" name="parameter" index="11_B2D" />
@@ -96,43 +82,13 @@
       <concept id="1178549954367" name="jetbrains.mps.baseLanguage.structure.IVisible" flags="ng" index="1B3ioH">
         <child id="1178549979242" name="visibility" index="1B3o_S" />
       </concept>
-      <concept id="6329021646629104954" name="jetbrains.mps.baseLanguage.structure.SingleLineComment" flags="nn" index="3SKdUt">
-        <child id="1350122676458893092" name="text" index="3ndbpf" />
-      </concept>
       <concept id="1146644602865" name="jetbrains.mps.baseLanguage.structure.PublicVisibility" flags="nn" index="3Tm1VV" />
       <concept id="1146644623116" name="jetbrains.mps.baseLanguage.structure.PrivateVisibility" flags="nn" index="3Tm6S6" />
     </language>
-    <language id="0b80a2e8-f9f1-47b3-823f-56eb115bca42" name="jetbrains.mps.typechecking.annotation">
-      <concept id="1942415814694854601" name="jetbrains.mps.typechecking.annotation.structure.ErrorAnnotation" flags="ng" index="1U20sH">
-        <property id="1942415814694854612" name="text" index="1U20sK" />
-      </concept>
-    </language>
     <language id="ceab5195-25ea-4f22-9b92-103b95ca8c0c" name="jetbrains.mps.lang.core">
-      <concept id="1133920641626" name="jetbrains.mps.lang.core.structure.BaseConcept" flags="ng" index="2VYdi">
-        <child id="5169995583184591170" name="smodelAttribute" index="lGtFl" />
-      </concept>
       <concept id="1169194658468" name="jetbrains.mps.lang.core.structure.INamedConcept" flags="ng" index="TrEIO">
         <property id="1169194664001" name="name" index="TrG5h" />
       </concept>
-      <concept id="4222318806802425298" name="jetbrains.mps.lang.core.structure.SuppressErrorsAnnotation" flags="ng" index="15s5l7">
-        <property id="8575328350543493365" name="message" index="huDt6" />
-        <property id="2423417345669755629" name="filter" index="1eyWvh" />
-      </concept>
-      <concept id="709746936026466394" name="jetbrains.mps.lang.core.structure.ChildAttribute" flags="ng" index="3VBwX9">
-        <property id="709746936026609031" name="linkId" index="3V$3ak" />
-        <property id="709746936026609029" name="role_DebugInfo" index="3V$3am" />
-      </concept>
-      <concept id="4452961908202556907" name="jetbrains.mps.lang.core.structure.BaseCommentAttribute" flags="ng" index="1X3_iC">
-        <child id="3078666699043039389" name="commentedNode" index="8Wnug" />
-      </concept>
-    </language>
-    <language id="c7fb639f-be78-4307-89b0-b5959c3fa8c8" name="jetbrains.mps.lang.text">
-      <concept id="155656958578482948" name="jetbrains.mps.lang.text.structure.Word" flags="ng" index="3oM_SD">
-        <property id="155656958578482949" name="value" index="3oM_SC" />
-      </concept>
-      <concept id="2535923850359271782" name="jetbrains.mps.lang.text.structure.Line" flags="ng" index="1PaTwC">
-        <child id="2535923850359271783" name="elements" index="1PaTwD" />
-      </concept>
     </language>
   </registry>
   <node concept="312cEu" id="4ekooLalg08">
@@ -166,15 +122,6 @@
     <node concept="312cEu" id="4ekooLalg0k" role="jymVt">
       <property role="2bfB8j" value="true" />
       <property role="TrG5h" value="J" />
-      <node concept="312cEg" id="4ekooLalg0l" role="jymVt">
-        <property role="34CwA1" value="false" />
-        <property role="eg7rD" value="false" />
-        <property role="TrG5h" value="t" />
-        <property role="3TUv4t" value="false" />
-        <node concept="16syzq" id="4ekooLalg0m" role="1tU5fm">
-          <ref role="16sUi3" node="4ekooLalg0v" resolve="T" />
-        </node>
-      </node>
       <node concept="3clFb_" id="4ekooLalg0n" role="jymVt">
         <property role="TrG5h" value="h" />
         <node concept="3uibUv" id="4ekooLalg0o" role="3clF45">
@@ -182,7 +129,7 @@
           <node concept="3uibUv" id="4ekooLalg0p" role="11_B2D">
             <ref role="3uigEE" node="4ekooLalg0k" resolve="Sample_bad2.J" />
             <node concept="16syzq" id="4ekooLalg0q" role="11_B2D">
-              <ref role="16sUi3" node="4ekooLalg0v" resolve="T" />
+              <ref role="16sUi3" node="4ekooLalg0v" resolve="T1" />
             </node>
           </node>
         </node>
@@ -194,7 +141,7 @@
       </node>
       <node concept="3Tm6S6" id="4ekooLalg0u" role="1B3o_S" />
       <node concept="16euLQ" id="4ekooLalg0v" role="16eVyc">
-        <property role="TrG5h" value="T" />
+        <property role="TrG5h" value="T1" />
         <node concept="3uibUv" id="4ekooLalg0w" role="3ztrMU">
           <ref role="3uigEE" node="4ekooLalg09" resolve="Sample_bad2.A" />
         </node>
@@ -206,7 +153,7 @@
       <node concept="3Tm6S6" id="4ekooLalg0y" role="1B3o_S" />
       <node concept="3uibUv" id="4ekooLalg0z" role="1zkMxy">
         <ref role="3uigEE" node="4ekooLalg0k" resolve="Sample_bad2.J" />
-        <node concept="3uibUv" id="4ekooLalg0$" role="11_B2D">
+        <node concept="3uibUv" id="1TH_SRmKc4x" role="11_B2D">
           <ref role="3uigEE" node="4ekooLalg0h" resolve="Sample_bad2.B" />
         </node>
       </node>
@@ -216,43 +163,12 @@
       <property role="TrG5h" value="H" />
       <node concept="3Tm6S6" id="4ekooLalg0A" role="1B3o_S" />
       <node concept="16euLQ" id="4ekooLalg0B" role="16eVyc">
-        <property role="TrG5h" value="T" />
+        <property role="TrG5h" value="T2" />
       </node>
     </node>
     <node concept="312cEu" id="4ekooLalg0C" role="jymVt">
       <property role="2bfB8j" value="true" />
       <property role="TrG5h" value="G" />
-      <node concept="3clFb_" id="4ekooLalg0D" role="jymVt">
-        <property role="TrG5h" value="g1" />
-        <node concept="37vLTG" id="4ekooLalg0E" role="3clF46">
-          <property role="TrG5h" value="h" />
-          <node concept="3uibUv" id="4ekooLalg0F" role="1tU5fm">
-            <ref role="3uigEE" node="4ekooLalg0_" resolve="Sample_bad2.H" />
-            <node concept="3qUE_q" id="4ekooLalg0G" role="11_B2D">
-              <node concept="3uibUv" id="4ekooLalg0H" role="3qUE_r">
-                <ref role="3uigEE" node="4ekooLalg0k" resolve="Sample_bad2.J" />
-                <node concept="16syzq" id="4ekooLalg0I" role="11_B2D">
-                  <ref role="16sUi3" node="4ekooLalg0N" resolve="T" />
-                </node>
-              </node>
-            </node>
-          </node>
-        </node>
-        <node concept="16syzq" id="4ekooLalg0J" role="3clF45">
-          <ref role="16sUi3" node="4ekooLalg0N" resolve="T" />
-        </node>
-        <node concept="3clFbS" id="4ekooLalg0K" role="3clF47">
-          <node concept="3clFbF" id="4ekooLalg0L" role="3cqZAp">
-            <node concept="10Nm6u" id="4ekooLalg0M" role="3clFbG" />
-          </node>
-        </node>
-        <node concept="16euLQ" id="4ekooLalg0N" role="16eVyc">
-          <property role="TrG5h" value="T" />
-          <node concept="3uibUv" id="2BbfRGCnuJ0" role="3ztrMU">
-            <ref role="3uigEE" node="4ekooLalg0h" resolve="Sample_bad2.B" />
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-        </node>
-      </node>
       <node concept="3clFb_" id="4ekooLalg0O" role="jymVt">
         <property role="TrG5h" value="g2" />
         <node concept="37vLTG" id="4ekooLalg0P" role="3clF46">
@@ -265,7 +181,7 @@
           </node>
         </node>
         <node concept="16syzq" id="4ekooLalg0S" role="3clF45">
-          <ref role="16sUi3" node="4ekooLalg0W" resolve="T" />
+          <ref role="16sUi3" node="4ekooLalg0W" resolve="T3" />
         </node>
         <node concept="3clFbS" id="4ekooLalg0T" role="3clF47">
           <node concept="3clFbF" id="4ekooLalg0U" role="3cqZAp">
@@ -273,7 +189,7 @@
           </node>
         </node>
         <node concept="16euLQ" id="4ekooLalg0W" role="16eVyc">
-          <property role="TrG5h" value="T" />
+          <property role="TrG5h" value="T3" />
         </node>
         <node concept="16euLQ" id="4ekooLalg0Y" role="16eVyc">
           <property role="TrG5h" value="S" />
@@ -281,7 +197,7 @@
             <ref role="3uigEE" node="4ekooLalg0k" resolve="Sample_bad2.J" />
             <node concept="3qUtgH" id="4ekooLalg10" role="11_B2D">
               <node concept="16syzq" id="4ekooLalg11" role="3qUvdb">
-                <ref role="16sUi3" node="4ekooLalg0W" resolve="T" />
+                <ref role="16sUi3" node="4ekooLalg0W" resolve="T3" />
               </node>
             </node>
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@@ -298,101 +214,6 @@
         <property role="DiZV1" value="false" />
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         <node concept="3clFbS" id="4ekooLalg17" role="3clF47">
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-              <node concept="3uibUv" id="4ekooLalg1a" role="1tU5fm">
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-                <node concept="2OqwBi" id="4ekooLalg1c" role="2Oq$k0">
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-                <property role="3oM_SC" value="real" />
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-              <node concept="3oM_SD" id="589APehYyKh" role="1PaTwD">
-                <property role="3oM_SC" value="type" />
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-              <node concept="3oM_SD" id="589APehYyKi" role="1PaTwD">
-                <property role="3oM_SC" value="of" />
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-              <node concept="3oM_SD" id="589APehYyKj" role="1PaTwD">
-                <property role="3oM_SC" value="s.t" />
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-              <node concept="3oM_SD" id="589APehYyKk" role="1PaTwD">
-                <property role="3oM_SC" value="should" />
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-              <node concept="3oM_SD" id="589APehYyKl" role="1PaTwD">
-                <property role="3oM_SC" value="be" />
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-                <property role="3oM_SC" value="|" />
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-                <property role="3oM_SC" value="J&lt;(B|A)&gt;)" />
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-                <property role="3oM_SC" value="(B" />
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             <node concept="3cpWsn" id="4ekooLalg1p" role="3cpWs9">
               <property role="TrG5h" value="g" />
@@ -406,137 +227,6 @@
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             </node>
           </node>
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-          <node concept="3clFbF" id="4ekooLalg1u" role="3cqZAp">
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-              <node concept="liA8E" id="4ekooLalg1x" role="2OqNvi">
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-              <property role="TrG5h" value="b1" />
-              <node concept="3uibUv" id="4ekooLalg1A" role="1tU5fm">
-                <ref role="3uigEE" node="4ekooLalg0h" resolve="Sample_bad2.B" />
-              </node>
-              <node concept="2OqwBi" id="4ekooLalg1B" role="33vP2m">
-                <node concept="37vLTw" id="4ekooLalg1C" role="2Oq$k0">
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-                <node concept="liA8E" id="4ekooLalg1D" role="2OqNvi">
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-          <node concept="3clFbH" id="4ekooLalg1F" role="3cqZAp" />
-          <node concept="1X3_iC" id="2BbfRGCnwcY" role="lGtFl">
-            <property role="3V$3am" value="statement" />
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-                <property role="TrG5h" value="a2" />
-                <node concept="3uibUv" id="4ekooLalg1I" role="1tU5fm">
-                  <ref role="3uigEE" node="4ekooLalg09" resolve="Sample_bad2.A" />
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-                <node concept="2OqwBi" id="4ekooLalg1J" role="33vP2m">
-                  <node concept="37vLTw" id="4ekooLalg1K" role="2Oq$k0">
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-          <node concept="3clFbH" id="4ekooLalg1P" role="3cqZAp" />
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-              <property role="TrG5h" value="b2" />
-              <node concept="3uibUv" id="4ekooLalg20" role="1tU5fm">
-                <ref role="3uigEE" node="4ekooLalg0h" resolve="Sample_bad2.B" />
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-              <node concept="2OqwBi" id="4ekooLalg21" role="33vP2m">
-                <node concept="37vLTw" id="4ekooLalg22" role="2Oq$k0">
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-          <node concept="3cpWs8" id="4ekooLalg26" role="3cqZAp">
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-              <node concept="16syzq" id="Co5va1REAG" role="1tU5fm">
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-              <node concept="2OqwBi" id="4ekooLalg29" role="33vP2m">
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           <node concept="3cpWs8" id="Co5va1REb3" role="3cqZAp">
             <node concept="3cpWsn" id="Co5va1REb4" role="3cpWs9">
@@ -560,16 +250,12 @@
                   </node>
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-              <node concept="1U20sH" id="8odmgCpqrd" role="lGtFl">
-                <property role="1U20sK" value="error" />
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-          <node concept="3clFbH" id="4ekooLalg2f" role="3cqZAp" />
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         <node concept="16euLQ" id="4ekooLalg2h" role="16eVyc">
-          <property role="TrG5h" value="T" />
+          <property role="TrG5h" value="T4" />
         </node>
         <node concept="16euLQ" id="4ekooLalg2j" role="16eVyc">
           <property role="TrG5h" value="S" />
@@ -577,7 +263,7 @@
             <ref role="3uigEE" node="4ekooLalg0k" resolve="Sample_bad2.J" />
             <node concept="3qUtgH" id="4ekooLalg2l" role="11_B2D">
               <node concept="16syzq" id="4ekooLalg2m" role="3qUvdb">
-                <ref role="16sUi3" node="4ekooLalg2h" resolve="T" />
+                <ref role="16sUi3" node="4ekooLalg2h" resolve="T4" />
               </node>
             </node>
           </node>
@@ -601,964 +287,5 @@
     </node>
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-    <node concept="312cEu" id="5s497Vrh7RG" role="jymVt">
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-        <property role="eg7rD" value="false" />
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-          <node concept="3clFbF" id="5vMXiMGU$Cc" role="3cqZAp">
-            <node concept="2OqwBi" id="5vMXiMGU$Cd" role="3clFbG">
-              <node concept="liA8E" id="5vMXiMGU$Ch" role="2OqNvi">
-                <ref role="37wK5l" node="5Pqb1qkLdO5" resolve="a" />
-                <node concept="1U20sH" id="5vMXiMGUH_2" role="lGtFl">
-                  <property role="1U20sK" value="error" />
-                </node>
-              </node>
-              <node concept="37vLTw" id="5vMXiMGU_Ab" role="2Oq$k0">
-                <ref role="3cqZAo" node="1Swggvms2Iu" resolve="bla" />
-              </node>
-            </node>
-          </node>
-        </node>
-        <node concept="3Tm1VV" id="5Pqb1qkLdRG" role="1B3o_S" />
-        <node concept="16euLQ" id="5Pqb1qkLdRH" role="16eVyc">
-          <property role="TrG5h" value="T5" />
-          <node concept="3uibUv" id="5Pqb1qkLdRI" role="3ztrMU">
-            <ref role="3uigEE" node="5Pqb1qkLdOc" resolve="Sample_bad3.B" />
-          </node>
-        </node>
-        <node concept="16euLQ" id="5Pqb1qkLdRJ" role="16eVyc">
-          <property role="TrG5h" value="S2" />
-          <node concept="3uibUv" id="5Pqb1qkLdRK" role="3ztrMU">
-            <ref role="3uigEE" node="5Pqb1qkLdOl" resolve="Sample_bad3.J" />
-            <node concept="3qUtgH" id="5Pqb1qkLdRL" role="11_B2D">
-              <node concept="16syzq" id="5Pqb1qkLdRM" role="3qUvdb">
-                <ref role="16sUi3" node="5Pqb1qkLdRH" resolve="T5" />
-              </node>
-            </node>
-          </node>
-        </node>
-        <node concept="37vLTG" id="5Pqb1qkLdRN" role="3clF46">
-          <property role="TrG5h" value="s" />
-          <node concept="16syzq" id="5Pqb1qkLdRO" role="1tU5fm">
-            <ref role="16sUi3" node="5Pqb1qkLdRJ" resolve="S2" />
-          </node>
-        </node>
-        <node concept="37vLTG" id="5Pqb1qkLdRP" role="3clF46">
-          <property role="TrG5h" value="h" />
-          <node concept="3uibUv" id="5Pqb1qkLdRQ" role="1tU5fm">
-            <ref role="3uigEE" node="5Pqb1qkLdOA" resolve="Sample_bad3.H" />
-            <node concept="3uibUv" id="5Pqb1qkLdRR" role="11_B2D">
-              <ref role="3uigEE" node="5Pqb1qkLdOy" resolve="Sample_bad3.K" />
-            </node>
-          </node>
-        </node>
-      </node>
-    </node>
-    <node concept="2tJIrI" id="5Pqb1qkLdRS" role="jymVt" />
-  </node>
 </model>
 
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.bounds.mps b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.bounds.mps
index d8886a1c..2906594b 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.bounds.mps
+++ b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.bounds.mps
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:9993217f-5bfa-4281-bc47-527677747cb2(typechecking.samples.baseLanguage.bounds)" doNotGenerate="true">
+<model ref="r:9993217f-5bfa-4281-bc47-527677747cb2(typechecking.samples.baseLanguage.bounds)">
   <persistence version="9" />
   <languages>
     <use id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage" version="9" />
@@ -18,12 +18,6 @@
       </concept>
       <concept id="1202948039474" name="jetbrains.mps.baseLanguage.structure.InstanceMethodCallOperation" flags="nn" index="liA8E" />
       <concept id="1465982738277781862" name="jetbrains.mps.baseLanguage.structure.PlaceholderMember" flags="ng" index="2tJIrI" />
-      <concept id="1188207840427" name="jetbrains.mps.baseLanguage.structure.AnnotationInstance" flags="nn" index="2AHcQZ">
-        <reference id="1188208074048" name="annotation" index="2AI5Lk" />
-      </concept>
-      <concept id="1188208481402" name="jetbrains.mps.baseLanguage.structure.HasAnnotation" flags="ng" index="2AJDlI">
-        <child id="1188208488637" name="annotation" index="2AJF6D" />
-      </concept>
       <concept id="2820489544401957797" name="jetbrains.mps.baseLanguage.structure.DefaultClassCreator" flags="nn" index="HV5vD">
         <reference id="2820489544401957798" name="classifier" index="HV5vE" />
       </concept>
@@ -44,13 +38,11 @@
         <reference id="1144433057691" name="classifier" index="1PxDUh" />
       </concept>
       <concept id="1070534058343" name="jetbrains.mps.baseLanguage.structure.NullLiteral" flags="nn" index="10Nm6u" />
-      <concept id="1070534370425" name="jetbrains.mps.baseLanguage.structure.IntegerType" flags="in" index="10Oyi0" />
       <concept id="1068390468200" name="jetbrains.mps.baseLanguage.structure.FieldDeclaration" flags="ig" index="312cEg">
         <property id="8606350594693632173" name="isTransient" index="eg7rD" />
         <property id="1240249534625" name="isVolatile" index="34CwA1" />
       </concept>
       <concept id="1068390468198" name="jetbrains.mps.baseLanguage.structure.ClassConcept" flags="ig" index="312cEu">
-        <child id="1095933932569" name="implementedInterface" index="EKbjA" />
         <child id="1165602531693" name="superclass" index="1zkMxy" />
       </concept>
       <concept id="1068431474542" name="jetbrains.mps.baseLanguage.structure.VariableDeclaration" flags="ng" index="33uBYm">
@@ -59,7 +51,6 @@
       </concept>
       <concept id="1109279763828" name="jetbrains.mps.baseLanguage.structure.TypeVariableDeclaration" flags="ng" index="16euLQ">
         <child id="1214996921760" name="bound" index="3ztrMU" />
-        <child id="1215091156086" name="auxBounds" index="3D4UlG" />
       </concept>
       <concept id="1109279851642" name="jetbrains.mps.baseLanguage.structure.GenericDeclaration" flags="ng" index="16eOlS">
         <child id="1109279881614" name="typeVariableDeclaration" index="16eVyc" />
@@ -75,9 +66,6 @@
       <concept id="4972933694980447171" name="jetbrains.mps.baseLanguage.structure.BaseVariableDeclaration" flags="ng" index="19Szcq">
         <child id="5680397130376446158" name="type" index="1tU5fm" />
       </concept>
-      <concept id="1111509017652" name="jetbrains.mps.baseLanguage.structure.FloatingPointConstant" flags="nn" index="3b6qkQ">
-        <property id="1113006610751" name="value" index="$nhwW" />
-      </concept>
       <concept id="1068580123132" name="jetbrains.mps.baseLanguage.structure.BaseMethodDeclaration" flags="ng" index="3clF44">
         <property id="4276006055363816570" name="isSynchronized" index="od$2w" />
         <property id="1181808852946" name="isFinal" index="DiZV1" />
@@ -86,7 +74,6 @@
         <child id="1068580123135" name="body" index="3clF47" />
       </concept>
       <concept id="1068580123165" name="jetbrains.mps.baseLanguage.structure.InstanceMethodDeclaration" flags="ig" index="3clFb_" />
-      <concept id="1068580123152" name="jetbrains.mps.baseLanguage.structure.EqualsExpression" flags="nn" index="3clFbC" />
       <concept id="1068580123155" name="jetbrains.mps.baseLanguage.structure.ExpressionStatement" flags="nn" index="3clFbF">
         <child id="1068580123156" name="expression" index="3clFbG" />
       </concept>
@@ -94,9 +81,6 @@
       <concept id="1068580123136" name="jetbrains.mps.baseLanguage.structure.StatementList" flags="sn" stub="5293379017992965193" index="3clFbS">
         <child id="1068581517665" name="statement" index="3cqZAp" />
       </concept>
-      <concept id="1068580320020" name="jetbrains.mps.baseLanguage.structure.IntegerConstant" flags="nn" index="3cmrfG">
-        <property id="1068580320021" name="value" index="3cmrfH" />
-      </concept>
       <concept id="1068581242864" name="jetbrains.mps.baseLanguage.structure.LocalVariableDeclarationStatement" flags="nn" index="3cpWs8">
         <child id="1068581242865" name="localVariableDeclaration" index="3cpWs9" />
       </concept>
@@ -110,7 +94,6 @@
         <property id="521412098689998745" name="nonStatic" index="2bfB8j" />
         <child id="5375687026011219971" name="member" index="jymVt" unordered="true" />
       </concept>
-      <concept id="1171903607971" name="jetbrains.mps.baseLanguage.structure.WildCardType" flags="in" index="3qTvmN" />
       <concept id="1171903862077" name="jetbrains.mps.baseLanguage.structure.LowerBoundType" flags="in" index="3qUtgH">
         <child id="1171903869531" name="bound" index="3qUvdb" />
       </concept>
@@ -122,29 +105,15 @@
         <reference id="1107535924139" name="classifier" index="3uigEE" />
         <child id="1109201940907" name="parameter" index="11_B2D" />
       </concept>
-      <concept id="1081773326031" name="jetbrains.mps.baseLanguage.structure.BinaryOperation" flags="nn" index="3uHJSO">
-        <child id="1081773367579" name="rightExpression" index="3uHU7w" />
-        <child id="1081773367580" name="leftExpression" index="3uHU7B" />
-      </concept>
       <concept id="1178549954367" name="jetbrains.mps.baseLanguage.structure.IVisible" flags="ng" index="1B3ioH">
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-        <child id="1163668914799" name="condition" index="3K4Cdx" />
-        <child id="1163668922816" name="ifTrue" index="3K4E3e" />
-        <child id="1163668934364" name="ifFalse" index="3K4GZi" />
-      </concept>
       <concept id="6329021646629104954" name="jetbrains.mps.baseLanguage.structure.SingleLineComment" flags="nn" index="3SKdUt">
         <child id="1350122676458893092" name="text" index="3ndbpf" />
       </concept>
       <concept id="1146644602865" name="jetbrains.mps.baseLanguage.structure.PublicVisibility" flags="nn" index="3Tm1VV" />
       <concept id="1146644623116" name="jetbrains.mps.baseLanguage.structure.PrivateVisibility" flags="nn" index="3Tm6S6" />
     </language>
-    <language id="0b80a2e8-f9f1-47b3-823f-56eb115bca42" name="jetbrains.mps.typechecking.annotation">
-      <concept id="1942415814694854601" name="jetbrains.mps.typechecking.annotation.structure.ErrorAnnotation" flags="ng" index="1U20sH">
-        <property id="1942415814694854612" name="text" index="1U20sK" />
-      </concept>
-    </language>
     <language id="ceab5195-25ea-4f22-9b92-103b95ca8c0c" name="jetbrains.mps.lang.core">
       <concept id="1133920641626" name="jetbrains.mps.lang.core.structure.BaseConcept" flags="ng" index="2VYdi">
         <child id="5169995583184591170" name="smodelAttribute" index="lGtFl" />
@@ -1968,973 +1937,5 @@
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     <node concept="3Tm1VV" id="3yhgKRJ29Qt" role="1B3o_S" />
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-    <node concept="312cEu" id="7w387SKGvbz" role="jymVt">
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-  </node>
 </model>
 
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/testHuge.mps b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.hugeSample.mps
similarity index 99%
rename from samples/mpscore/solutions/typechecking.samples.baseLanguage/models/testHuge.mps
rename to samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.hugeSample.mps
index 04541a90..d1db7b66 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/testHuge.mps
+++ b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.hugeSample.mps
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:adc5f7a2-194e-4476-81d8-c4dac5765bcf(typechecking.samples.baseLanguage.testHuge)" doNotGenerate="true">
+<model ref="r:adc5f7a2-194e-4476-81d8-c4dac5765bcf(typechecking.samples.baseLanguage.hugeSample)" doNotGenerate="true">
   <persistence version="9" />
   <languages>
     <devkit ref="fbc25dd2-5da4-483a-8b19-70928e1b62d7(jetbrains.mps.devkit.general-purpose)" />
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.simpleGenerics.mps b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.simpleGenerics.mps
deleted file mode 100644
index 47a87f25..00000000
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.simpleGenerics.mps
+++ /dev/null
@@ -1,507 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<model ref="r:5669dd77-177e-474f-8fb2-c015a8eb4306(typechecking.samples.baseLanguage.simpleGenerics)" doNotGenerate="true">
-  <persistence version="9" />
-  <languages>
-    <use id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage" version="9" />
-    <use id="0fda14cc-a416-4c81-869a-2175d8b3325d" name="jetbrains.mps.baseLanguageExt" version="0" />
-    <use id="0b80a2e8-f9f1-47b3-823f-56eb115bca42" name="jetbrains.mps.typechecking.annotation" version="0" />
-  </languages>
-  <imports>
-    <import index="33ny" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.util(JDK/)" />
-    <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" />
-    <import index="guwi" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.io(JDK/)" />
-  </imports>
-  <registry>
-    <language id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage">
-      <concept id="1215693861676" name="jetbrains.mps.baseLanguage.structure.BaseAssignmentExpression" flags="nn" index="d038R">
-        <child id="1068498886297" name="rValue" index="37vLTx" />
-        <child id="1068498886295" name="lValue" index="37vLTJ" />
-      </concept>
-      <concept id="1202948039474" name="jetbrains.mps.baseLanguage.structure.InstanceMethodCallOperation" flags="nn" index="liA8E" />
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-      <concept id="2820489544401957797" name="jetbrains.mps.baseLanguage.structure.DefaultClassCreator" flags="nn" index="HV5vD">
-        <reference id="2820489544401957798" name="classifier" index="HV5vE" />
-        <child id="2820489544402271667" name="typeParameter" index="HU9BZ" />
-      </concept>
-      <concept id="1197027756228" name="jetbrains.mps.baseLanguage.structure.DotExpression" flags="nn" index="2OqwBi">
-        <child id="1197027771414" name="operand" index="2Oq$k0" />
-        <child id="1197027833540" name="operation" index="2OqNvi" />
-      </concept>
-      <concept id="1197029447546" name="jetbrains.mps.baseLanguage.structure.FieldReferenceOperation" flags="nn" index="2OwXpG">
-        <reference id="1197029500499" name="fieldDeclaration" index="2Oxat5" />
-      </concept>
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-      </concept>
-      <concept id="1070534058343" name="jetbrains.mps.baseLanguage.structure.NullLiteral" flags="nn" index="10Nm6u" />
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-        <property id="8606350594693632173" name="isTransient" index="eg7rD" />
-        <property id="1240249534625" name="isVolatile" index="34CwA1" />
-      </concept>
-      <concept id="1068390468198" name="jetbrains.mps.baseLanguage.structure.ClassConcept" flags="ig" index="312cEu">
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-        <property id="1221565133444" name="isFinal" index="1EXbeo" />
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-        <child id="1068431790190" name="initializer" index="33vP2m" />
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-      <concept id="1109279763828" name="jetbrains.mps.baseLanguage.structure.TypeVariableDeclaration" flags="ng" index="16euLQ">
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-      </concept>
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-        <child id="5680397130376446158" name="type" index="1tU5fm" />
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-      <concept id="1068580123132" name="jetbrains.mps.baseLanguage.structure.BaseMethodDeclaration" flags="ng" index="3clF44">
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-      <concept id="1068580123136" name="jetbrains.mps.baseLanguage.structure.StatementList" flags="sn" stub="5293379017992965193" index="3clFbS">
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-      <concept id="1068581242878" name="jetbrains.mps.baseLanguage.structure.ReturnStatement" flags="nn" index="3cpWs6">
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-      <concept id="1068581242864" name="jetbrains.mps.baseLanguage.structure.LocalVariableDeclarationStatement" flags="nn" index="3cpWs8">
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diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.slice.mps b/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.slice.mps
deleted file mode 100644
index cb0e285a..00000000
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/models/typechecking.samples.baseLanguage.slice.mps
+++ /dev/null
@@ -1,1161 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
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-    <use id="0fda14cc-a416-4c81-869a-2175d8b3325d" name="jetbrains.mps.baseLanguageExt" version="0" />
-  </languages>
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-
diff --git a/samples/mpscore/solutions/typechecking.samples.baseLanguage/typechecking.samples.baseLanguage.msd b/samples/mpscore/solutions/typechecking.samples.baseLanguage/typechecking.samples.baseLanguage.msd
index fa2613f2..635b0ebd 100644
--- a/samples/mpscore/solutions/typechecking.samples.baseLanguage/typechecking.samples.baseLanguage.msd
+++ b/samples/mpscore/solutions/typechecking.samples.baseLanguage/typechecking.samples.baseLanguage.msd
@@ -16,6 +16,7 @@
     <dependency reexport="false">bbf5c548-7111-4a53-a117-cdefc664cf34(jetbrains.mps.logic.reactor)</dependency>
     <dependency reexport="false">c4803b19-6d89-4a3b-bf82-390769514add(jetbrains.mps.lang.coderules)</dependency>
     <dependency reexport="false">7a5dda62-9140-4668-ab76-d5ed1746f2b2(jetbrains.mps.lang.typesystem)</dependency>
+    <dependency reexport="false">e44e7802-2e40-482b-9b1c-6d42660a6a11(jetbrains.mps.baseLanguageExt.test)</dependency>
   </dependencies>
   <languageVersions>
     <language slang="l:f3061a53-9226-4cc5-a443-f952ceaf5816:jetbrains.mps.baseLanguage" version="9" />
@@ -49,6 +50,7 @@
     <module reference="83888646-71ce-4f1c-9c53-c54016f6ad4f(jetbrains.mps.baseLanguage.collections)" version="0" />
     <module reference="e39e4a59-8cb6-498e-860e-8fa8361c0d90(jetbrains.mps.baseLanguage.scopes)" version="0" />
     <module reference="0fda14cc-a416-4c81-869a-2175d8b3325d(jetbrains.mps.baseLanguageExt)" version="0" />
+    <module reference="e44e7802-2e40-482b-9b1c-6d42660a6a11(jetbrains.mps.baseLanguageExt.test)" version="0" />
     <module reference="f97d84b2-8bad-4fdd-8ede-da17b3eacf4c(jetbrains.mps.coderules)" version="0" />
     <module reference="6998f568-f0e9-473b-b4a8-9efb6499fc8d(jetbrains.mps.coderules.typechecking)" version="0" />
     <module reference="c9670c16-a215-41fb-8784-04b14329799d(jetbrains.mps.coderules.typechecking.test)" version="0" />