diff --git a/typechecking/solutions/jetbrains.mps.typechecking/models/jetbrains.mps.typechecking.plugin.mps b/typechecking/solutions/jetbrains.mps.typechecking/models/jetbrains.mps.typechecking.plugin.mps
index eafb6c53..5667b12f 100644
--- a/typechecking/solutions/jetbrains.mps.typechecking/models/jetbrains.mps.typechecking.plugin.mps
+++ b/typechecking/solutions/jetbrains.mps.typechecking/models/jetbrains.mps.typechecking.plugin.mps
@@ -91,6 +91,8 @@
     <import index="m4y7" ref="35e2a720-13d8-4eda-88d3-ff9d78d5a3ae/java:io.reactivex.schedulers(jetbrains.mps.typechecking/)" />
     <import index="unkn" ref="35e2a720-13d8-4eda-88d3-ff9d78d5a3ae/java:io.reactivex(jetbrains.mps.typechecking/)" />
     <import index="f4yq" ref="35e2a720-13d8-4eda-88d3-ff9d78d5a3ae/java:hu.akarnokd.rxjava2.swing(jetbrains.mps.typechecking/)" />
+    <import index="e0w6" ref="35e2a720-13d8-4eda-88d3-ff9d78d5a3ae/java:io.reactivex.observers(jetbrains.mps.typechecking/)" />
+    <import index="5zyv" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.util.concurrent(JDK/)" />
     <import index="zn9m" ref="498d89d2-c2e9-11e2-ad49-6cf049e62fe5/java:com.intellij.openapi.util(MPS.IDEA/)" implicit="true" />
   </imports>
   <registry>
@@ -521,6 +523,7 @@
       </concept>
       <concept id="8974276187400348181" name="jetbrains.mps.lang.access.structure.ExecuteLightweightCommandStatement" flags="nn" index="1QHqEK" />
       <concept id="8974276187400348183" name="jetbrains.mps.lang.access.structure.ExecuteWriteActionStatement" flags="nn" index="1QHqEM" />
+      <concept id="8974276187400348179" name="jetbrains.mps.lang.access.structure.ExecuteEDTCommandStatement" flags="nn" index="1QHqEQ" />
     </language>
     <language id="774bf8a0-62e5-41e1-af63-f4812e60e48b" name="jetbrains.mps.baseLanguage.checkedDots">
       <concept id="4079382982702596667" name="jetbrains.mps.baseLanguage.checkedDots.structure.CheckedDotExpression" flags="nn" index="2EnYce" />
@@ -574,6 +577,7 @@
       <concept id="1167227138527" name="jetbrains.mps.baseLanguage.logging.structure.LogStatement" flags="nn" index="34ab3g">
         <property id="1167228628751" name="hasException" index="34fQS0" />
         <property id="1167245565795" name="severity" index="35gtTG" />
+        <child id="2034914114981546959" name="project" index="RQzLk" />
         <child id="1167227463056" name="logExpression" index="34bqiv" />
         <child id="1167227561449" name="exception" index="34bMjA" />
       </concept>
@@ -722,9 +726,24 @@
           <node concept="2YIFZM" id="33j_O21qOLl" role="3clFbG">
             <ref role="37wK5l" node="3WU9yfAbTWe" resolve="clearAll" />
             <ref role="1Pybhc" node="41ox5VnpFrR" resolve="MarkPlugin" />
-            <node concept="2OqwBi" id="33j_O21qOLm" role="37wK5m">
-              <node concept="2WthIp" id="33j_O21qOLn" role="2Oq$k0" />
-              <node concept="1DTwFV" id="33j_O21qOLo" role="2OqNvi">
+            <node concept="2OqwBi" id="Hg6EncZCYM" role="37wK5m">
+              <node concept="2WthIp" id="Hg6EncZCYN" role="2Oq$k0" />
+              <node concept="1DTwFV" id="Hg6EncZCYO" role="2OqNvi">
+                <ref role="2WH_rO" node="7iCFfvQBVbg" resolve="mpsProject" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3cpWs8" id="Hg6EncZADa" role="3cqZAp">
+          <node concept="3cpWsn" id="Hg6EncZADb" role="3cpWs9">
+            <property role="TrG5h" value="mp" />
+            <property role="3TUv4t" value="true" />
+            <node concept="3uibUv" id="Hg6EncZAD9" role="1tU5fm">
+              <ref role="3uigEE" to="z1c4:~MPSProject" resolve="MPSProject" />
+            </node>
+            <node concept="2OqwBi" id="Hg6EncZADc" role="33vP2m">
+              <node concept="2WthIp" id="Hg6EncZADd" role="2Oq$k0" />
+              <node concept="1DTwFV" id="Hg6EncZADe" role="2OqNvi">
                 <ref role="2WH_rO" node="7iCFfvQBVbg" resolve="mpsProject" />
               </node>
             </node>
@@ -732,7 +751,7 @@
         </node>
         <node concept="3cpWs8" id="2mbQB8JiWeg" role="3cqZAp">
           <node concept="3cpWsn" id="2mbQB8JiWeh" role="3cpWs9">
-            <property role="TrG5h" value="project" />
+            <property role="TrG5h" value="ip" />
             <property role="3TUv4t" value="true" />
             <node concept="3uibUv" id="2mbQB8JiWee" role="1tU5fm">
               <ref role="3uigEE" to="4nm9:~Project" resolve="Project" />
@@ -781,27 +800,41 @@
                         <node concept="3cqZAl" id="3F6vMxqbBpY" role="3clF45" />
                         <node concept="3Tm1VV" id="3F6vMxqbBpZ" role="1B3o_S" />
                         <node concept="3clFbS" id="3F6vMxqbBq1" role="3clF47">
-                          <node concept="3clFbF" id="7E66$cFcEoB" role="3cqZAp">
-                            <node concept="2OqwBi" id="7E66$cFcF4D" role="3clFbG">
-                              <node concept="2YIFZM" id="7E66$cFdtfT" role="2Oq$k0">
-                                <ref role="1Pybhc" to="jkny:~ToolWindowManager" resolve="ToolWindowManager" />
-                                <ref role="37wK5l" to="jkny:~ToolWindowManager.getInstance(com.intellij.openapi.project.Project):com.intellij.openapi.wm.ToolWindowManager" resolve="getInstance" />
-                                <node concept="37vLTw" id="2mbQB8JiWel" role="37wK5m">
-                                  <ref role="3cqZAo" node="2mbQB8JiWeh" resolve="project" />
+                          <node concept="1QHqEQ" id="Hg6EncZ$_s" role="3cqZAp">
+                            <node concept="1QHqEC" id="Hg6EncZ$_u" role="1QHqEI">
+                              <node concept="3clFbS" id="Hg6EncZ$_w" role="1bW5cS">
+                                <node concept="3clFbF" id="7E66$cFcEoB" role="3cqZAp">
+                                  <node concept="2OqwBi" id="7E66$cFcF4D" role="3clFbG">
+                                    <node concept="2YIFZM" id="7E66$cFdtfT" role="2Oq$k0">
+                                      <ref role="1Pybhc" to="jkny:~ToolWindowManager" resolve="ToolWindowManager" />
+                                      <ref role="37wK5l" to="jkny:~ToolWindowManager.getInstance(com.intellij.openapi.project.Project):com.intellij.openapi.wm.ToolWindowManager" resolve="getInstance" />
+                                      <node concept="37vLTw" id="2mbQB8JiWel" role="37wK5m">
+                                        <ref role="3cqZAo" node="2mbQB8JiWeh" resolve="ip" />
+                                      </node>
+                                    </node>
+                                    <node concept="liA8E" id="7E66$cFcG6q" role="2OqNvi">
+                                      <ref role="37wK5l" to="jkny:~ToolWindowManager.notifyByBalloon(java.lang.String,com.intellij.openapi.ui.MessageType,java.lang.String):void" resolve="notifyByBalloon" />
+                                      <node concept="Xl_RD" id="7E66$cFcGpZ" role="37wK5m">
+                                        <property role="Xl_RC" value="Activation Trace" />
+                                      </node>
+                                      <node concept="10M0yZ" id="7E66$cFcH3r" role="37wK5m">
+                                        <ref role="3cqZAo" to="jkm4:~MessageType.INFO" resolve="INFO" />
+                                        <ref role="1PxDUh" to="jkm4:~MessageType" resolve="MessageType" />
+                                      </node>
+                                      <node concept="37vLTw" id="7E66$cFcIiF" role="37wK5m">
+                                        <ref role="3cqZAo" node="3F6vMxqbBpW" resolve="message" />
+                                      </node>
+                                    </node>
+                                  </node>
                                 </node>
                               </node>
-                              <node concept="liA8E" id="7E66$cFcG6q" role="2OqNvi">
-                                <ref role="37wK5l" to="jkny:~ToolWindowManager.notifyByBalloon(java.lang.String,com.intellij.openapi.ui.MessageType,java.lang.String):void" resolve="notifyByBalloon" />
-                                <node concept="Xl_RD" id="7E66$cFcGpZ" role="37wK5m">
-                                  <property role="Xl_RC" value="Activation Trace" />
-                                </node>
-                                <node concept="10M0yZ" id="7E66$cFcH3r" role="37wK5m">
-                                  <ref role="3cqZAo" to="jkm4:~MessageType.INFO" resolve="INFO" />
-                                  <ref role="1PxDUh" to="jkm4:~MessageType" resolve="MessageType" />
-                                </node>
-                                <node concept="37vLTw" id="7E66$cFcIiF" role="37wK5m">
-                                  <ref role="3cqZAo" node="3F6vMxqbBpW" resolve="message" />
-                                </node>
+                            </node>
+                            <node concept="2OqwBi" id="Hg6EncZ_H_" role="ukAjM">
+                              <node concept="37vLTw" id="Hg6EncZCjg" role="2Oq$k0">
+                                <ref role="3cqZAo" node="Hg6EncZADb" resolve="mp" />
+                              </node>
+                              <node concept="liA8E" id="Hg6EncZCS3" role="2OqNvi">
+                                <ref role="37wK5l" to="z1c3:~Project.getRepository():org.jetbrains.mps.openapi.module.SRepository" resolve="getRepository" />
                               </node>
                             </node>
                           </node>
@@ -817,27 +850,41 @@
                         <node concept="3cqZAl" id="3F6vMxqbBq6" role="3clF45" />
                         <node concept="3Tm1VV" id="3F6vMxqbBq7" role="1B3o_S" />
                         <node concept="3clFbS" id="3F6vMxqbBq9" role="3clF47">
-                          <node concept="3clFbF" id="7E66$cFcIXg" role="3cqZAp">
-                            <node concept="2OqwBi" id="7E66$cFcIXh" role="3clFbG">
-                              <node concept="2YIFZM" id="7E66$cFdsDn" role="2Oq$k0">
-                                <ref role="1Pybhc" to="jkny:~ToolWindowManager" resolve="ToolWindowManager" />
-                                <ref role="37wK5l" to="jkny:~ToolWindowManager.getInstance(com.intellij.openapi.project.Project):com.intellij.openapi.wm.ToolWindowManager" resolve="getInstance" />
-                                <node concept="37vLTw" id="2mbQB8JiXzr" role="37wK5m">
-                                  <ref role="3cqZAo" node="2mbQB8JiWeh" resolve="project" />
+                          <node concept="1QHqEQ" id="Hg6EncZD3a" role="3cqZAp">
+                            <node concept="1QHqEC" id="Hg6EncZD3b" role="1QHqEI">
+                              <node concept="3clFbS" id="Hg6EncZD3c" role="1bW5cS">
+                                <node concept="3clFbF" id="7E66$cFcIXg" role="3cqZAp">
+                                  <node concept="2OqwBi" id="7E66$cFcIXh" role="3clFbG">
+                                    <node concept="2YIFZM" id="7E66$cFdsDn" role="2Oq$k0">
+                                      <ref role="1Pybhc" to="jkny:~ToolWindowManager" resolve="ToolWindowManager" />
+                                      <ref role="37wK5l" to="jkny:~ToolWindowManager.getInstance(com.intellij.openapi.project.Project):com.intellij.openapi.wm.ToolWindowManager" resolve="getInstance" />
+                                      <node concept="37vLTw" id="2mbQB8JiXzr" role="37wK5m">
+                                        <ref role="3cqZAo" node="2mbQB8JiWeh" resolve="ip" />
+                                      </node>
+                                    </node>
+                                    <node concept="liA8E" id="7E66$cFcIXj" role="2OqNvi">
+                                      <ref role="37wK5l" to="jkny:~ToolWindowManager.notifyByBalloon(java.lang.String,com.intellij.openapi.ui.MessageType,java.lang.String):void" resolve="notifyByBalloon" />
+                                      <node concept="Xl_RD" id="7E66$cFcIXk" role="37wK5m">
+                                        <property role="Xl_RC" value="Activation Trace" />
+                                      </node>
+                                      <node concept="10M0yZ" id="7E66$cFduQQ" role="37wK5m">
+                                        <ref role="3cqZAo" to="jkm4:~MessageType.ERROR" resolve="ERROR" />
+                                        <ref role="1PxDUh" to="jkm4:~MessageType" resolve="MessageType" />
+                                      </node>
+                                      <node concept="37vLTw" id="7E66$cFcIXm" role="37wK5m">
+                                        <ref role="3cqZAo" node="3F6vMxqbBq4" resolve="message" />
+                                      </node>
+                                    </node>
+                                  </node>
                                 </node>
                               </node>
-                              <node concept="liA8E" id="7E66$cFcIXj" role="2OqNvi">
-                                <ref role="37wK5l" to="jkny:~ToolWindowManager.notifyByBalloon(java.lang.String,com.intellij.openapi.ui.MessageType,java.lang.String):void" resolve="notifyByBalloon" />
-                                <node concept="Xl_RD" id="7E66$cFcIXk" role="37wK5m">
-                                  <property role="Xl_RC" value="Activation Trace" />
-                                </node>
-                                <node concept="10M0yZ" id="7E66$cFduQQ" role="37wK5m">
-                                  <ref role="3cqZAo" to="jkm4:~MessageType.ERROR" resolve="ERROR" />
-                                  <ref role="1PxDUh" to="jkm4:~MessageType" resolve="MessageType" />
-                                </node>
-                                <node concept="37vLTw" id="7E66$cFcIXm" role="37wK5m">
-                                  <ref role="3cqZAo" node="3F6vMxqbBq4" resolve="message" />
-                                </node>
+                            </node>
+                            <node concept="2OqwBi" id="Hg6EncZD3l" role="ukAjM">
+                              <node concept="37vLTw" id="Hg6EncZD3m" role="2Oq$k0">
+                                <ref role="3cqZAo" node="Hg6EncZADb" resolve="mp" />
+                              </node>
+                              <node concept="liA8E" id="Hg6EncZD3n" role="2OqNvi">
+                                <ref role="37wK5l" to="z1c3:~Project.getRepository():org.jetbrains.mps.openapi.module.SRepository" resolve="getRepository" />
                               </node>
                             </node>
                           </node>
@@ -926,7 +973,7 @@
               <ref role="3cqZAo" node="1pPth$lNMX4" resolve="helper" />
             </node>
             <node concept="liA8E" id="1pPth$lO9dC" role="2OqNvi">
-              <ref role="37wK5l" node="1pPth$lNVW2" resolve="execute" />
+              <ref role="37wK5l" node="1pPth$lNVW2" resolve="executeAsync" />
             </node>
           </node>
         </node>
@@ -4607,14 +4654,111 @@
     </node>
     <node concept="2tJIrI" id="1pPth$lJZlM" role="jymVt" />
     <node concept="3clFb_" id="1pPth$lNVW2" role="jymVt">
-      <property role="TrG5h" value="execute" />
-      <node concept="3cqZAl" id="1pPth$lNVW4" role="3clF45" />
+      <property role="TrG5h" value="executeAsync" />
       <node concept="3Tm1VV" id="1pPth$lNVW5" role="1B3o_S" />
       <node concept="3clFbS" id="1pPth$lNVW6" role="3clF47">
         <node concept="3clFbF" id="2mbQB8J79UG" role="3cqZAp">
-          <node concept="1rXfSq" id="2mbQB8J79UF" role="3clFbG">
-            <ref role="37wK5l" node="2mbQB8J5m$l" resolve="execute" />
-            <node concept="2YIFZM" id="2mbQB8JnYap" role="37wK5m">
+          <node concept="2OqwBi" id="Hg6EncO4Ce" role="3clFbG">
+            <node concept="1rXfSq" id="2mbQB8J79UF" role="2Oq$k0">
+              <ref role="37wK5l" node="Hg6End$aLl" resolve="scheduleExecute" />
+            </node>
+            <node concept="liA8E" id="Hg6EncO4Vl" role="2OqNvi">
+              <ref role="37wK5l" to="unkn:~CompletableSource.subscribe(io.reactivex.CompletableObserver):void" resolve="subscribe" />
+              <node concept="2ShNRf" id="Hg6EncPovE" role="37wK5m">
+                <node concept="YeOm9" id="Hg6EncPqlx" role="2ShVmc">
+                  <node concept="1Y3b0j" id="Hg6EncPql$" role="YeSDq">
+                    <property role="2bfB8j" value="true" />
+                    <ref role="1Y3XeK" to="e0w6:~DisposableCompletableObserver" resolve="DisposableCompletableObserver" />
+                    <ref role="37wK5l" to="e0w6:~DisposableCompletableObserver.&lt;init&gt;()" resolve="DisposableCompletableObserver" />
+                    <node concept="3Tm1VV" id="Hg6EncPql_" role="1B3o_S" />
+                    <node concept="3clFb_" id="Hg6EncPqlE" role="jymVt">
+                      <property role="1EzhhJ" value="false" />
+                      <property role="TrG5h" value="onError" />
+                      <property role="DiZV1" value="false" />
+                      <property role="od$2w" value="false" />
+                      <node concept="3Tm1VV" id="Hg6EncPqlF" role="1B3o_S" />
+                      <node concept="3cqZAl" id="Hg6EncPqlH" role="3clF45" />
+                      <node concept="37vLTG" id="Hg6EncPqlI" role="3clF46">
+                        <property role="TrG5h" value="thr" />
+                        <node concept="3uibUv" id="Hg6EncPqlJ" role="1tU5fm">
+                          <ref role="3uigEE" to="wyt6:~Throwable" resolve="Throwable" />
+                        </node>
+                      </node>
+                      <node concept="3clFbS" id="Hg6EncPqlL" role="3clF47">
+                        <node concept="34ab3g" id="Hg6EncPEF2" role="3cqZAp">
+                          <property role="35gtTG" value="warn" />
+                          <property role="34fQS0" value="true" />
+                          <node concept="2OqwBi" id="Hg6EncPFSZ" role="34bqiv">
+                            <node concept="37vLTw" id="Hg6EncPFaf" role="2Oq$k0">
+                              <ref role="3cqZAo" node="Hg6EncPqlI" resolve="thr" />
+                            </node>
+                            <node concept="liA8E" id="Hg6EncPGiV" role="2OqNvi">
+                              <ref role="37wK5l" to="wyt6:~Throwable.getMessage():java.lang.String" resolve="getMessage" />
+                            </node>
+                          </node>
+                          <node concept="37vLTw" id="Hg6EncPGXS" role="34bMjA">
+                            <ref role="3cqZAo" node="Hg6EncPqlI" resolve="thr" />
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="3clFb_" id="Hg6EncPqlN" role="jymVt">
+                      <property role="1EzhhJ" value="false" />
+                      <property role="TrG5h" value="onComplete" />
+                      <property role="DiZV1" value="false" />
+                      <property role="od$2w" value="false" />
+                      <node concept="3Tm1VV" id="Hg6EncPqlO" role="1B3o_S" />
+                      <node concept="3cqZAl" id="Hg6EncPqlQ" role="3clF45" />
+                      <node concept="3clFbS" id="Hg6EncPqlR" role="3clF47" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3cqZAl" id="Hg6EncONQt" role="3clF45" />
+    </node>
+    <node concept="2tJIrI" id="Hg6EncPaQm" role="jymVt" />
+    <node concept="3clFb_" id="Hg6EncMFl4" role="jymVt">
+      <property role="TrG5h" value="executeAsync" />
+      <node concept="37vLTG" id="Hg6EncNd4t" role="3clF46">
+        <property role="TrG5h" value="observer" />
+        <node concept="3uibUv" id="Hg6EncO2Un" role="1tU5fm">
+          <ref role="3uigEE" to="unkn:~CompletableObserver" resolve="CompletableObserver" />
+        </node>
+      </node>
+      <node concept="3cqZAl" id="Hg6EncMFl6" role="3clF45" />
+      <node concept="3Tm1VV" id="Hg6EncMFl7" role="1B3o_S" />
+      <node concept="3clFbS" id="Hg6EncMFl8" role="3clF47">
+        <node concept="3clFbF" id="Hg6EncO3Oq" role="3cqZAp">
+          <node concept="2OqwBi" id="Hg6EncO3U5" role="3clFbG">
+            <node concept="1rXfSq" id="Hg6EncO3Op" role="2Oq$k0">
+              <ref role="37wK5l" node="Hg6End$aLl" resolve="scheduleExecute" />
+            </node>
+            <node concept="liA8E" id="Hg6EncO4cq" role="2OqNvi">
+              <ref role="37wK5l" to="unkn:~CompletableSource.subscribe(io.reactivex.CompletableObserver):void" resolve="subscribe" />
+              <node concept="37vLTw" id="Hg6EncO4t0" role="37wK5m">
+                <ref role="3cqZAo" node="Hg6EncNd4t" resolve="observer" />
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="Hg6EncS7jA" role="jymVt" />
+    <node concept="3clFb_" id="Hg6End$aLl" role="jymVt">
+      <property role="TrG5h" value="scheduleExecute" />
+      <node concept="3uibUv" id="Hg6End$aLo" role="3clF45">
+        <ref role="3uigEE" to="unkn:~CompletableSource" resolve="CompletableSource" />
+      </node>
+      <node concept="3Tm1VV" id="Hg6End$aLp" role="1B3o_S" />
+      <node concept="3clFbS" id="Hg6End$aLq" role="3clF47">
+        <node concept="3clFbF" id="Hg6EndD1pg" role="3cqZAp">
+          <node concept="1rXfSq" id="Hg6EndD1pf" role="3clFbG">
+            <ref role="37wK5l" node="2mbQB8J5m$l" resolve="scheduleExecute" />
+            <node concept="2YIFZM" id="Hg6EndD1UU" role="37wK5m">
               <ref role="37wK5l" to="m4y7:~Schedulers.single():io.reactivex.Scheduler" resolve="single" />
               <ref role="1Pybhc" to="m4y7:~Schedulers" resolve="Schedulers" />
             </node>
@@ -4624,47 +4768,66 @@
     </node>
     <node concept="2tJIrI" id="2mbQB8J5cnc" role="jymVt" />
     <node concept="3clFb_" id="2mbQB8J5m$l" role="jymVt">
-      <property role="TrG5h" value="execute" />
+      <property role="TrG5h" value="scheduleExecute" />
       <node concept="37vLTG" id="2mbQB8J5_aK" role="3clF46">
-        <property role="TrG5h" value="scheduler" />
+        <property role="TrG5h" value="subscribeScheduler" />
         <node concept="3uibUv" id="2mbQB8J5JvK" role="1tU5fm">
           <ref role="3uigEE" to="unkn:~Scheduler" resolve="Scheduler" />
         </node>
       </node>
-      <node concept="3cqZAl" id="2mbQB8J5m$n" role="3clF45" />
-      <node concept="3Tm1VV" id="2mbQB8J5m$o" role="1B3o_S" />
+      <node concept="3uibUv" id="Hg6EncNtzU" role="3clF45">
+        <ref role="3uigEE" to="unkn:~CompletableSource" resolve="CompletableSource" />
+      </node>
+      <node concept="3Tm1VV" id="Hg6EndaMgs" role="1B3o_S" />
       <node concept="3clFbS" id="2mbQB8J5m$p" role="3clF47">
         <node concept="3clFbF" id="2mbQB8J6NGX" role="3cqZAp">
           <node concept="37vLTI" id="2mbQB8J6Olk" role="3clFbG">
             <node concept="37vLTw" id="2mbQB8J6OAm" role="37vLTx">
-              <ref role="3cqZAo" node="2mbQB8J5_aK" resolve="scheduler" />
+              <ref role="3cqZAo" node="2mbQB8J5_aK" resolve="subscribeScheduler" />
             </node>
             <node concept="2OqwBi" id="2mbQB8J6NUf" role="37vLTJ">
               <node concept="Xjq3P" id="2mbQB8J6NGW" role="2Oq$k0" />
               <node concept="2OwXpG" id="2mbQB8J6O7c" role="2OqNvi">
-                <ref role="2Oxat5" node="2mbQB8J6JB2" resolve="taskScheduler" />
+                <ref role="2Oxat5" node="2mbQB8J6JB2" resolve="subscribeScheduler" />
               </node>
             </node>
           </node>
         </node>
-        <node concept="3clFbF" id="1pPth$lO5eC" role="3cqZAp">
-          <node concept="2OqwBi" id="1pPth$lO5kn" role="3clFbG">
-            <node concept="37vLTw" id="1pPth$lO5eB" role="2Oq$k0">
-              <ref role="3cqZAo" node="1pPth$lKAeY" resolve="firstStep" />
-            </node>
-            <node concept="liA8E" id="1pPth$lO5sb" role="2OqNvi">
-              <ref role="37wK5l" node="1pPth$lLWAw" resolve="execute" />
-              <node concept="2YIFZM" id="2S1TqeBI3He" role="37wK5m">
-                <ref role="37wK5l" to="wyt6:~System.nanoTime():long" resolve="nanoTime" />
-                <ref role="1Pybhc" to="wyt6:~System" resolve="System" />
+        <node concept="3clFbF" id="Hg6EnchDMq" role="3cqZAp">
+          <node concept="2OqwBi" id="Hg6EncNJ_E" role="3clFbG">
+            <node concept="2OqwBi" id="Hg6EnchE1Q" role="2Oq$k0">
+              <node concept="37vLTw" id="Hg6EnchDMo" role="2Oq$k0">
+                <ref role="3cqZAo" node="1pPth$lKAeY" resolve="firstStep" />
               </node>
-              <node concept="10Nm6u" id="1pPth$lO5Nv" role="37wK5m" />
+              <node concept="liA8E" id="Hg6EnchEiO" role="2OqNvi">
+                <ref role="37wK5l" node="Hg6EnccFiY" resolve="doSchedule" />
+                <node concept="2OqwBi" id="Hg6End8i0h" role="37wK5m">
+                  <node concept="2YIFZM" id="Hg6EnchFDn" role="2Oq$k0">
+                    <ref role="37wK5l" to="unkn:~Single.just(java.lang.Object):io.reactivex.Single" resolve="just" />
+                    <ref role="1Pybhc" to="unkn:~Single" resolve="Single" />
+                    <node concept="2ShNRf" id="Hg6EncBuQt" role="37wK5m">
+                      <node concept="HV5vD" id="Hg6EncBwMh" role="2ShVmc">
+                        <ref role="HV5vE" node="Hg6Enc_35l" resolve="TypecheckingHelper.Init" />
+                      </node>
+                    </node>
+                  </node>
+                  <node concept="liA8E" id="Hg6End8jDM" role="2OqNvi">
+                    <ref role="37wK5l" to="unkn:~Single.subscribeOn(io.reactivex.Scheduler):io.reactivex.Single" resolve="subscribeOn" />
+                    <node concept="37vLTw" id="Hg6End8kht" role="37wK5m">
+                      <ref role="3cqZAo" node="2mbQB8J5_aK" resolve="subscribeScheduler" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="liA8E" id="Hg6EncNL$g" role="2OqNvi">
+              <ref role="37wK5l" to="unkn:~Single.toCompletable():io.reactivex.Completable" resolve="toCompletable" />
             </node>
           </node>
         </node>
       </node>
     </node>
-    <node concept="2tJIrI" id="1pPth$lNTte" role="jymVt" />
+    <node concept="2tJIrI" id="Hg6EncN$OF" role="jymVt" />
     <node concept="312cEg" id="1pPth$lA2Na" role="jymVt">
       <property role="TrG5h" value="mpsProject" />
       <node concept="3Tmbuc" id="3F6vMxqcYz0" role="1B3o_S" />
@@ -4699,7 +4862,7 @@
       </node>
     </node>
     <node concept="312cEg" id="2mbQB8J6JB2" role="jymVt">
-      <property role="TrG5h" value="taskScheduler" />
+      <property role="TrG5h" value="subscribeScheduler" />
       <node concept="3Tm6S6" id="2mbQB8J6JB3" role="1B3o_S" />
       <node concept="3uibUv" id="2mbQB8J6JB4" role="1tU5fm">
         <ref role="3uigEE" to="unkn:~Scheduler" resolve="Scheduler" />
@@ -4710,18 +4873,29 @@
       <property role="2bfB8j" value="true" />
       <property role="TrG5h" value="Step" />
       <property role="1sVAO0" value="true" />
-      <node concept="3clFb_" id="1pPth$lABj7" role="jymVt">
-        <property role="TrG5h" value="execute" />
+      <node concept="3clFb_" id="Hg6Enc2x8M" role="jymVt">
+        <property role="TrG5h" value="schedule" />
         <property role="1EzhhJ" value="true" />
-        <node concept="37vLTG" id="1pPth$lC3nn" role="3clF46">
-          <property role="TrG5h" value="prev" />
-          <node concept="16syzq" id="1pPth$lDN0$" role="1tU5fm">
-            <ref role="16sUi3" node="1pPth$lD_uI" resolve="Prev" />
+        <node concept="37vLTG" id="Hg6Enc3Jbw" role="3clF46">
+          <property role="TrG5h" value="prevStep" />
+          <node concept="3uibUv" id="Hg6Enc3Olc" role="1tU5fm">
+            <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+            <node concept="16syzq" id="Hg6Enc3OSk" role="11_B2D">
+              <ref role="16sUi3" node="1pPth$lD_uI" resolve="Prev" />
+            </node>
           </node>
         </node>
-        <node concept="3cqZAl" id="1pPth$lLK5X" role="3clF45" />
-        <node concept="3Tmbuc" id="1pPth$lLMis" role="1B3o_S" />
-        <node concept="3clFbS" id="1pPth$lABjb" role="3clF47" />
+        <node concept="3uibUv" id="Hg6Enc6cUH" role="3clF45">
+          <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+          <node concept="3qUE_q" id="Hg6Enc6olk" role="11_B2D">
+            <node concept="3uibUv" id="Hg6Enc6oUe" role="3qUE_r">
+              <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+              <node concept="3qTvmN" id="Hg6Encs16z" role="11_B2D" />
+            </node>
+          </node>
+        </node>
+        <node concept="3Tmbuc" id="Hg6EncFur4" role="1B3o_S" />
+        <node concept="3clFbS" id="Hg6Enc2x8Q" role="3clF47" />
       </node>
       <node concept="3clFb_" id="1pPth$lL0jk" role="jymVt">
         <property role="TrG5h" value="info" />
@@ -4730,41 +4904,118 @@
         <node concept="3Tmbuc" id="1pPth$lLOmJ" role="1B3o_S" />
         <node concept="3clFbS" id="1pPth$lL0jo" role="3clF47" />
       </node>
-      <node concept="2tJIrI" id="1pPth$lLYG6" role="jymVt" />
-      <node concept="3clFb_" id="1pPth$lLWAw" role="jymVt">
-        <property role="TrG5h" value="execute" />
+      <node concept="2tJIrI" id="Hg6Enc2rPV" role="jymVt" />
+      <node concept="3clFb_" id="Hg6EnccFiY" role="jymVt">
         <property role="DiZV1" value="true" />
-        <node concept="37vLTG" id="1pPth$lMaiK" role="3clF46">
-          <property role="TrG5h" value="time" />
-          <node concept="3cpWsb" id="1pPth$lMczv" role="1tU5fm" />
-        </node>
-        <node concept="37vLTG" id="1pPth$lMiRh" role="3clF46">
-          <property role="TrG5h" value="prev" />
-          <node concept="16syzq" id="1pPth$lMl4k" role="1tU5fm">
-            <ref role="16sUi3" node="1pPth$lD_uI" resolve="Prev" />
+        <property role="TrG5h" value="doSchedule" />
+        <node concept="37vLTG" id="Hg6EncdbMF" role="3clF46">
+          <property role="TrG5h" value="prevStep" />
+          <node concept="3uibUv" id="Hg6EncdmgF" role="1tU5fm">
+            <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+            <node concept="3qUE_q" id="Hg6EncoSjK" role="11_B2D">
+              <node concept="3uibUv" id="Hg6EncoTxa" role="3qUE_r">
+                <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+                <node concept="3qTvmN" id="Hg6EncqGOx" role="11_B2D" />
+              </node>
+            </node>
           </node>
         </node>
-        <node concept="3cqZAl" id="1pPth$lLWAy" role="3clF45" />
-        <node concept="3Tm1VV" id="1pPth$lLWAz" role="1B3o_S" />
-        <node concept="3clFbS" id="1pPth$lLWA$" role="3clF47">
-          <node concept="3clFbF" id="1pPth$lMlMn" role="3cqZAp">
-            <node concept="37vLTI" id="1pPth$lMmxW" role="3clFbG">
-              <node concept="37vLTw" id="1pPth$lMmGp" role="37vLTx">
-                <ref role="3cqZAo" node="1pPth$lMaiK" resolve="time" />
+        <node concept="3uibUv" id="Hg6EnchhtM" role="3clF45">
+          <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+          <node concept="3qUE_q" id="Hg6EnchqmN" role="11_B2D">
+            <node concept="3uibUv" id="Hg6EnchqUZ" role="3qUE_r">
+              <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+              <node concept="3qTvmN" id="Hg6EncqFQd" role="11_B2D" />
+            </node>
+          </node>
+        </node>
+        <node concept="3Tm1VV" id="Hg6EnccFj1" role="1B3o_S" />
+        <node concept="3clFbS" id="Hg6EnccFj2" role="3clF47">
+          <node concept="3cpWs8" id="Hg6EncflFF" role="3cqZAp">
+            <node concept="3cpWsn" id="Hg6EncflFG" role="3cpWs9">
+              <property role="TrG5h" value="scheduledStep" />
+              <node concept="3uibUv" id="Hg6EncflFq" role="1tU5fm">
+                <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+                <node concept="3qUE_q" id="Hg6EncflFx" role="11_B2D">
+                  <node concept="3uibUv" id="Hg6Encnt7J" role="3qUE_r">
+                    <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+                    <node concept="3qTvmN" id="Hg6EncqIqm" role="11_B2D" />
+                  </node>
+                </node>
               </node>
-              <node concept="2OqwBi" id="1pPth$lMlWf" role="37vLTJ">
-                <node concept="Xjq3P" id="1pPth$lMlMm" role="2Oq$k0" />
-                <node concept="2OwXpG" id="1pPth$lMm8d" role="2OqNvi">
-                  <ref role="2Oxat5" node="1pPth$lLkEu" resolve="time" />
+              <node concept="1rXfSq" id="Hg6EncflFH" role="33vP2m">
+                <ref role="37wK5l" node="Hg6Enc2x8M" resolve="schedule" />
+                <node concept="2OqwBi" id="Hg6EncJU0D" role="37wK5m">
+                  <node concept="1eOMI4" id="Hg6Encpn2Q" role="2Oq$k0">
+                    <node concept="10QFUN" id="Hg6Encpn2R" role="1eOMHV">
+                      <node concept="3uibUv" id="Hg6Encpn2N" role="10QFUM">
+                        <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+                        <node concept="16syzq" id="Hg6Encpn2O" role="11_B2D">
+                          <ref role="16sUi3" node="1pPth$lD_uI" resolve="Prev" />
+                        </node>
+                      </node>
+                      <node concept="37vLTw" id="Hg6Encpn2P" role="10QFUP">
+                        <ref role="3cqZAo" node="Hg6EncdbMF" resolve="prevStep" />
+                      </node>
+                    </node>
+                  </node>
+                  <node concept="liA8E" id="Hg6EncJVew" role="2OqNvi">
+                    <ref role="37wK5l" to="unkn:~Single.map(io.reactivex.functions.Function):io.reactivex.Single" resolve="map" />
+                    <node concept="1bVj0M" id="Hg6EncJW9Z" role="37wK5m">
+                      <node concept="37vLTG" id="Hg6EncJWNA" role="1bW2Oz">
+                        <property role="TrG5h" value="p" />
+                        <node concept="16syzq" id="Hg6EncJXw8" role="1tU5fm">
+                          <ref role="16sUi3" node="1pPth$lD_uI" resolve="Prev" />
+                        </node>
+                      </node>
+                      <node concept="3clFbS" id="Hg6EncJWa0" role="1bW5cS">
+                        <node concept="3clFbF" id="Hg6EncJZVr" role="3cqZAp">
+                          <node concept="37vLTI" id="Hg6EncK3jv" role="3clFbG">
+                            <node concept="2YIFZM" id="Hg6EncK5aQ" role="37vLTx">
+                              <ref role="37wK5l" to="wyt6:~System.nanoTime():long" resolve="nanoTime" />
+                              <ref role="1Pybhc" to="wyt6:~System" resolve="System" />
+                            </node>
+                            <node concept="2OqwBi" id="Hg6EncK0zs" role="37vLTJ">
+                              <node concept="Xjq3P" id="Hg6EncJZVp" role="2Oq$k0" />
+                              <node concept="2OwXpG" id="Hg6EncK10D" role="2OqNvi">
+                                <ref role="2Oxat5" node="1pPth$lLkEu" resolve="time" />
+                              </node>
+                            </node>
+                          </node>
+                        </node>
+                        <node concept="3clFbF" id="Hg6EncJZfP" role="3cqZAp">
+                          <node concept="37vLTw" id="Hg6EncJZfN" role="3clFbG">
+                            <ref role="3cqZAo" node="Hg6EncJWNA" resolve="p" />
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                  </node>
                 </node>
               </node>
             </node>
           </node>
-          <node concept="3clFbF" id="1pPth$lMnLi" role="3cqZAp">
-            <node concept="1rXfSq" id="1pPth$lMnLg" role="3clFbG">
-              <ref role="37wK5l" node="1pPth$lABj7" resolve="execute" />
-              <node concept="37vLTw" id="1pPth$lMo4$" role="37wK5m">
-                <ref role="3cqZAo" node="1pPth$lMiRh" resolve="prev" />
+          <node concept="3cpWs6" id="Hg6Encg5w$" role="3cqZAp">
+            <node concept="3K4zz7" id="Hg6EncgmL1" role="3cqZAk">
+              <node concept="37vLTw" id="Hg6EncgBDs" role="3K4GZi">
+                <ref role="3cqZAo" node="Hg6EncflFG" resolve="scheduledStep" />
+              </node>
+              <node concept="3y3z36" id="Hg6EncgdWg" role="3K4Cdx">
+                <node concept="10Nm6u" id="Hg6EncgdWh" role="3uHU7w" />
+                <node concept="37vLTw" id="Hg6EncgdWi" role="3uHU7B">
+                  <ref role="3cqZAo" node="1pPth$lA_6T" resolve="nextStep" />
+                </node>
+              </node>
+              <node concept="2OqwBi" id="Hg6Encgv2k" role="3K4E3e">
+                <node concept="37vLTw" id="Hg6Encgv2l" role="2Oq$k0">
+                  <ref role="3cqZAo" node="1pPth$lA_6T" resolve="nextStep" />
+                </node>
+                <node concept="liA8E" id="Hg6Encgv2m" role="2OqNvi">
+                  <ref role="37wK5l" node="Hg6EnccFiY" resolve="doSchedule" />
+                  <node concept="37vLTw" id="Hg6EncnrIL" role="37wK5m">
+                    <ref role="3cqZAo" node="Hg6EncflFG" resolve="scheduledStep" />
+                  </node>
+                </node>
               </node>
             </node>
           </node>
@@ -4884,6 +5135,7 @@
           </node>
         </node>
       </node>
+      <node concept="2tJIrI" id="Hg6Enc2hBq" role="jymVt" />
       <node concept="3clFb_" id="7dgRGU4MD7E" role="jymVt">
         <property role="TrG5h" value="done" />
         <node concept="3cqZAl" id="7dgRGU4MD7F" role="3clF45" />
@@ -4918,83 +5170,48 @@
               </node>
             </node>
           </node>
-          <node concept="3clFbJ" id="7dgRGU4MD85" role="3cqZAp">
-            <node concept="3clFbS" id="7dgRGU4MD86" role="3clFbx">
-              <node concept="3clFbF" id="7dgRGU4MD87" role="3cqZAp">
-                <node concept="2OqwBi" id="7dgRGU4MD88" role="3clFbG">
-                  <node concept="37vLTw" id="7dgRGU4MD89" role="2Oq$k0">
-                    <ref role="3cqZAo" node="1pPth$lA_6T" resolve="nextStep" />
+          <node concept="3clFbH" id="Hg6EnchITn" role="3cqZAp" />
+          <node concept="3clFbJ" id="Hg6EnchJIp" role="3cqZAp">
+            <node concept="3clFbS" id="Hg6EnchJIr" role="3clFbx">
+              <node concept="3clFbF" id="Hg6EnchKPW" role="3cqZAp">
+                <node concept="2OqwBi" id="Hg6EnchKPX" role="3clFbG">
+                  <node concept="37vLTw" id="Hg6EnchKPY" role="2Oq$k0">
+                    <ref role="3cqZAo" node="3F6vMxqaA$x" resolve="myCallback" />
                   </node>
-                  <node concept="liA8E" id="7dgRGU4MD8a" role="2OqNvi">
-                    <ref role="37wK5l" node="1pPth$lLWAw" resolve="execute" />
-                    <node concept="2YIFZM" id="2S1TqeBI3Fr" role="37wK5m">
-                      <ref role="37wK5l" to="wyt6:~System.nanoTime():long" resolve="nanoTime" />
-                      <ref role="1Pybhc" to="wyt6:~System" resolve="System" />
-                    </node>
-                    <node concept="Xjq3P" id="7dgRGU4MD8c" role="37wK5m" />
-                  </node>
-                </node>
-              </node>
-              <node concept="3clFbH" id="1N_0WA5K8tW" role="3cqZAp" />
-            </node>
-            <node concept="1Wc70l" id="7dgRGU4MD8d" role="3clFbw">
-              <node concept="37vLTw" id="7dgRGU4MD8e" role="3uHU7w">
-                <ref role="3cqZAo" node="7dgRGU4MD8r" resolve="canContinue" />
-              </node>
-              <node concept="3y3z36" id="7dgRGU4MD8f" role="3uHU7B">
-                <node concept="37vLTw" id="7dgRGU4MD8g" role="3uHU7B">
-                  <ref role="3cqZAo" node="1pPth$lA_6T" resolve="nextStep" />
-                </node>
-                <node concept="10Nm6u" id="7dgRGU4MD8h" role="3uHU7w" />
-              </node>
-            </node>
-            <node concept="9aQIb" id="7dgRGU4MD8i" role="9aQIa">
-              <node concept="3clFbS" id="7dgRGU4MD8j" role="9aQI4">
-                <node concept="3clFbF" id="3F6vMxqbRah" role="3cqZAp">
-                  <node concept="2OqwBi" id="3F6vMxqbRVQ" role="3clFbG">
-                    <node concept="37vLTw" id="3F6vMxqbRaf" role="2Oq$k0">
-                      <ref role="3cqZAo" node="3F6vMxqaA$x" resolve="myCallback" />
-                    </node>
-                    <node concept="liA8E" id="3F6vMxqbS43" role="2OqNvi">
-                      <ref role="37wK5l" node="3F6vMxqaA38" resolve="failed" />
-                      <node concept="2OqwBi" id="1N_0WA5Karu" role="37wK5m">
-                        <node concept="37vLTw" id="1N_0WA5K9GS" role="2Oq$k0">
-                          <ref role="3cqZAo" node="1pPth$lAEQs" resolve="feedback" />
-                        </node>
-                        <node concept="liA8E" id="1N_0WA5Ka$t" role="2OqNvi">
-                          <ref role="37wK5l" to="wyt6:~StringBuilder.toString():java.lang.String" resolve="toString" />
-                        </node>
+                  <node concept="liA8E" id="Hg6EnchKPZ" role="2OqNvi">
+                    <ref role="37wK5l" node="3F6vMxqaA38" resolve="failed" />
+                    <node concept="2OqwBi" id="Hg6EnchKQ0" role="37wK5m">
+                      <node concept="37vLTw" id="Hg6EnchKQ1" role="2Oq$k0">
+                        <ref role="3cqZAo" node="1pPth$lAEQs" resolve="feedback" />
+                      </node>
+                      <node concept="liA8E" id="Hg6EnchKQ2" role="2OqNvi">
+                        <ref role="37wK5l" to="wyt6:~StringBuilder.toString():java.lang.String" resolve="toString" />
                       </node>
                     </node>
                   </node>
                 </node>
               </node>
+              <node concept="YS8fn" id="Hg6EnchLXH" role="3cqZAp">
+                <node concept="2ShNRf" id="Hg6EnchMzj" role="YScLw">
+                  <node concept="1pGfFk" id="Hg6EncidCB" role="2ShVmc">
+                    <ref role="37wK5l" to="wyt6:~RuntimeException.&lt;init&gt;(java.lang.String)" resolve="RuntimeException" />
+                    <node concept="3cpWs3" id="Hg6Encie8m" role="37wK5m">
+                      <node concept="1rXfSq" id="Hg6Encieqg" role="3uHU7B">
+                        <ref role="37wK5l" node="1pPth$lL0jk" resolve="info" />
+                      </node>
+                      <node concept="Xl_RD" id="Hg6EncidUc" role="3uHU7w">
+                        <property role="Xl_RC" value=": execution failed" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="3clFbH" id="Hg6EnchJIq" role="3cqZAp" />
             </node>
-            <node concept="3eNFk2" id="1N_0WA5K7fX" role="3eNLev">
-              <node concept="37vLTw" id="1N_0WA5K7Vs" role="3eO9$A">
+            <node concept="3fqX7Q" id="Hg6EnchKaG" role="3clFbw">
+              <node concept="37vLTw" id="Hg6EnchKEq" role="3fr31v">
                 <ref role="3cqZAo" node="7dgRGU4MD8p" resolve="success" />
               </node>
-              <node concept="3clFbS" id="1N_0WA5K7fZ" role="3eOfB_">
-                <node concept="3clFbF" id="3F6vMxqbOPD" role="3cqZAp">
-                  <node concept="2OqwBi" id="3F6vMxqbPok" role="3clFbG">
-                    <node concept="37vLTw" id="3F6vMxqbOPB" role="2Oq$k0">
-                      <ref role="3cqZAo" node="3F6vMxqaA$x" resolve="myCallback" />
-                    </node>
-                    <node concept="liA8E" id="3F6vMxqbPB0" role="2OqNvi">
-                      <ref role="37wK5l" node="3F6vMxqaA32" resolve="ok" />
-                      <node concept="2OqwBi" id="7dgRGU4MD8m" role="37wK5m">
-                        <node concept="37vLTw" id="7dgRGU4MD8n" role="2Oq$k0">
-                          <ref role="3cqZAo" node="1pPth$lAEQs" resolve="feedback" />
-                        </node>
-                        <node concept="liA8E" id="7dgRGU4MD8o" role="2OqNvi">
-                          <ref role="37wK5l" to="wyt6:~StringBuilder.toString():java.lang.String" resolve="toString" />
-                        </node>
-                      </node>
-                    </node>
-                  </node>
-                </node>
-                <node concept="3clFbH" id="1N_0WA5K8vc" role="3cqZAp" />
-              </node>
             </node>
           </node>
         </node>
@@ -5011,6 +5228,7 @@
           <node concept="17QB3L" id="1N_0WA5Kdfa" role="1tU5fm" />
         </node>
       </node>
+      <node concept="2tJIrI" id="Hg6Enc2mC3" role="jymVt" />
       <node concept="3clFb_" id="7dgRGU4Nmfr" role="jymVt">
         <property role="TrG5h" value="done" />
         <node concept="3cqZAl" id="7dgRGU4Nmfs" role="3clF45" />
@@ -5041,8 +5259,10 @@
         <node concept="3Tmbuc" id="1pPth$lK_by" role="1B3o_S" />
         <node concept="3uibUv" id="1pPth$lDQDU" role="1tU5fm">
           <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
-          <node concept="3uibUv" id="1pPth$lE49m" role="11_B2D">
-            <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+          <node concept="3qUE_q" id="Hg6Encg36t" role="11_B2D">
+            <node concept="3uibUv" id="Hg6Encg3J7" role="3qUE_r">
+              <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+            </node>
           </node>
         </node>
       </node>
@@ -5058,10 +5278,77 @@
         <property role="TrG5h" value="Prev" />
         <node concept="3uibUv" id="1pPth$lDDZf" role="3ztrMU">
           <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+          <node concept="3qTvmN" id="Hg6Encrihf" role="11_B2D" />
         </node>
       </node>
     </node>
     <node concept="2tJIrI" id="1pPth$lI95o" role="jymVt" />
+    <node concept="312cEu" id="Hg6Enc_35l" role="jymVt">
+      <property role="2bfB8j" value="true" />
+      <property role="TrG5h" value="Init" />
+      <node concept="3clFb_" id="Hg6Enc_ddu" role="jymVt">
+        <property role="TrG5h" value="schedule" />
+        <property role="1EzhhJ" value="false" />
+        <node concept="37vLTG" id="Hg6Enc_ddv" role="3clF46">
+          <property role="TrG5h" value="prevStep" />
+          <node concept="3uibUv" id="Hg6Enc_ddw" role="1tU5fm">
+            <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+            <node concept="3uibUv" id="Hg6Enc_ddC" role="11_B2D">
+              <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+              <node concept="3qTvmN" id="Hg6Enc_ddD" role="11_B2D" />
+            </node>
+          </node>
+        </node>
+        <node concept="3uibUv" id="Hg6Enc_ddy" role="3clF45">
+          <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+          <node concept="3qUE_q" id="Hg6Enc_ddz" role="11_B2D">
+            <node concept="3uibUv" id="Hg6Enc_dd$" role="3qUE_r">
+              <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+              <node concept="3qTvmN" id="Hg6Enc_dd_" role="11_B2D" />
+            </node>
+          </node>
+        </node>
+        <node concept="3Tmbuc" id="Hg6EncFTJv" role="1B3o_S" />
+        <node concept="3clFbS" id="Hg6Enc_ddE" role="3clF47">
+          <node concept="YS8fn" id="Hg6Enc_f4b" role="3cqZAp">
+            <node concept="2ShNRf" id="Hg6Enc_fkl" role="YScLw">
+              <node concept="1pGfFk" id="Hg6Enc_hqR" role="2ShVmc">
+                <ref role="37wK5l" to="wyt6:~UnsupportedOperationException.&lt;init&gt;()" resolve="UnsupportedOperationException" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="2AHcQZ" id="Hg6Enc_ddF" role="2AJF6D">
+          <ref role="2AI5Lk" to="wyt6:~Override" resolve="Override" />
+        </node>
+      </node>
+      <node concept="3clFb_" id="Hg6Enc_ddS" role="jymVt">
+        <property role="TrG5h" value="info" />
+        <property role="1EzhhJ" value="false" />
+        <node concept="17QB3L" id="Hg6Enc_ddT" role="3clF45" />
+        <node concept="3Tmbuc" id="Hg6Enc_ddU" role="1B3o_S" />
+        <node concept="3clFbS" id="Hg6Enc_ddW" role="3clF47">
+          <node concept="3clFbF" id="Hg6Enc_edL" role="3cqZAp">
+            <node concept="Xl_RD" id="Hg6Enc_edK" role="3clFbG">
+              <property role="Xl_RC" value="init" />
+            </node>
+          </node>
+        </node>
+        <node concept="2AHcQZ" id="Hg6Enc_ddX" role="2AJF6D">
+          <ref role="2AI5Lk" to="wyt6:~Override" resolve="Override" />
+        </node>
+      </node>
+      <node concept="3Tm1VV" id="Hg6Enc_35m" role="1B3o_S" />
+      <node concept="3uibUv" id="Hg6Enc_bWh" role="1zkMxy">
+        <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+        <node concept="3uibUv" id="Hg6Enc_c$c" role="11_B2D">
+          <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+          <node concept="3qTvmN" id="Hg6Enc_dcw" role="11_B2D" />
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="Hg6Enc$TyV" role="jymVt" />
+    <node concept="2tJIrI" id="Hg6Enc$U3A" role="jymVt" />
     <node concept="312cEu" id="1pPth$lAwc0" role="jymVt">
       <property role="2bfB8j" value="true" />
       <property role="TrG5h" value="ApplyTemplatesStep" />
@@ -5089,7 +5376,6 @@
           <node concept="3Tqbb2" id="4n$QnzZUD2S" role="1tU5fm" />
         </node>
       </node>
-      <node concept="2tJIrI" id="1pPth$lMApL" role="jymVt" />
       <node concept="3clFb_" id="1pPth$lMB$v" role="jymVt">
         <property role="TrG5h" value="info" />
         <property role="1EzhhJ" value="false" />
@@ -5103,368 +5389,378 @@
           </node>
         </node>
       </node>
-      <node concept="2tJIrI" id="7y50OW6Wqm$" role="jymVt" />
-      <node concept="3clFb_" id="1pPth$lAD7c" role="jymVt">
-        <property role="TrG5h" value="execute" />
+      <node concept="2tJIrI" id="Hg6Enc3xms" role="jymVt" />
+      <node concept="3clFb_" id="Hg6Enc3ZJW" role="jymVt">
+        <property role="TrG5h" value="schedule" />
         <property role="1EzhhJ" value="false" />
-        <node concept="37vLTG" id="1pPth$lE62p" role="3clF46">
-          <property role="TrG5h" value="prev" />
-          <node concept="3uibUv" id="1pPth$lE6Nv" role="1tU5fm">
-            <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+        <node concept="37vLTG" id="Hg6Enc3ZJX" role="3clF46">
+          <property role="TrG5h" value="prevStep" />
+          <node concept="3uibUv" id="Hg6Enc3ZJY" role="1tU5fm">
+            <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+            <node concept="3uibUv" id="Hg6Enc_ppe" role="11_B2D">
+              <ref role="3uigEE" node="Hg6Enc_35l" resolve="TypecheckingHelper.Init" />
+            </node>
           </node>
         </node>
-        <node concept="3cqZAl" id="1pPth$lAD7d" role="3clF45" />
-        <node concept="3Tm1VV" id="1pPth$lAD7e" role="1B3o_S" />
-        <node concept="3clFbS" id="1pPth$lAD7g" role="3clF47">
-          <node concept="3clFbH" id="2UGjFq4Luye" role="3cqZAp" />
-          <node concept="3clFbF" id="2mbQB8J93Hy" role="3cqZAp">
-            <node concept="2OqwBi" id="2mbQB8J9NoT" role="3clFbG">
-              <node concept="2OqwBi" id="5mg4ZgKUakX" role="2Oq$k0">
-                <node concept="2OqwBi" id="2mbQB8J9lpr" role="2Oq$k0">
-                  <node concept="2YIFZM" id="2mbQB8J95Le" role="2Oq$k0">
-                    <ref role="37wK5l" to="unkn:~Observable.fromCallable(java.util.concurrent.Callable):io.reactivex.Observable" resolve="fromCallable" />
-                    <ref role="1Pybhc" to="unkn:~Observable" resolve="Observable" />
-                    <node concept="1bVj0M" id="2mbQB8J99Gs" role="37wK5m">
-                      <node concept="3clFbS" id="2mbQB8J99Gt" role="1bW5cS">
-                        <node concept="3cpWs8" id="6i42QSslQlP" role="3cqZAp">
-                          <node concept="3cpWsn" id="6i42QSslQlQ" role="3cpWs9">
-                            <property role="TrG5h" value="result" />
-                            <node concept="2YIFZM" id="2FXL1yZvCpW" role="33vP2m">
-                              <ref role="37wK5l" to="hano:7Oc59RSEjeq" resolve="OK" />
-                              <ref role="1Pybhc" to="hano:7Oc59RSEjdb" resolve="Result" />
-                            </node>
-                            <node concept="3uibUv" id="6i42QSslQlN" role="1tU5fm">
-                              <ref role="3uigEE" to="hano:7Oc59RSEjdb" resolve="Result" />
-                            </node>
+        <node concept="3uibUv" id="Hg6Enc5CAw" role="3clF45">
+          <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+          <node concept="3qUE_q" id="Hg6EncuiAn" role="11_B2D">
+            <node concept="3uibUv" id="Hg6EncuiAo" role="3qUE_r">
+              <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+              <node concept="3qTvmN" id="Hg6EncuiAp" role="11_B2D" />
+            </node>
+          </node>
+        </node>
+        <node concept="3Tmbuc" id="Hg6EncFBbo" role="1B3o_S" />
+        <node concept="3clFbS" id="Hg6Enc3ZK4" role="3clF47">
+          <node concept="3clFbH" id="Hg6Enc44js" role="3cqZAp" />
+          <node concept="3clFbF" id="Hg6Enc49zS" role="3cqZAp">
+            <node concept="2OqwBi" id="Hg6Enc4Znp" role="3clFbG">
+              <node concept="2OqwBi" id="Hg6Enc4a0C" role="2Oq$k0">
+                <node concept="37vLTw" id="Hg6Enc49zQ" role="2Oq$k0">
+                  <ref role="3cqZAo" node="Hg6Enc3ZJX" resolve="prevStep" />
+                </node>
+                <node concept="liA8E" id="Hg6Enc4hNz" role="2OqNvi">
+                  <ref role="37wK5l" to="unkn:~Single.map(io.reactivex.functions.Function):io.reactivex.Single" resolve="map" />
+                  <node concept="1bVj0M" id="Hg6Enc4Jpw" role="37wK5m">
+                    <node concept="37vLTG" id="Hg6Enc4Ka2" role="1bW2Oz">
+                      <property role="TrG5h" value="prevStep" />
+                      <node concept="3uibUv" id="Hg6EncCJdD" role="1tU5fm">
+                        <ref role="3uigEE" node="Hg6Enc_35l" resolve="TypecheckingHelper.Init" />
+                      </node>
+                    </node>
+                    <node concept="3clFbS" id="Hg6Enc4Jpx" role="1bW5cS">
+                      <node concept="3clFbH" id="Hg6Enc4Xyy" role="3cqZAp" />
+                      <node concept="3cpWs8" id="Hg6Enc4WaR" role="3cqZAp">
+                        <node concept="3cpWsn" id="Hg6Enc4WaS" role="3cpWs9">
+                          <property role="TrG5h" value="result" />
+                          <node concept="2YIFZM" id="Hg6Enc4WaT" role="33vP2m">
+                            <ref role="37wK5l" to="hano:7Oc59RSEjeq" resolve="OK" />
+                            <ref role="1Pybhc" to="hano:7Oc59RSEjdb" resolve="Result" />
                           </node>
-                        </node>
-                        <node concept="1QHqEK" id="3GlpCDStf0i" role="3cqZAp">
-                          <node concept="1QHqEC" id="3GlpCDStf0k" role="1QHqEI">
-                            <node concept="3clFbS" id="3GlpCDStf0m" role="1bW5cS">
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-                                  <node concept="3cpWs8" id="4n$QnzZUsy3" role="3cqZAp">
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-                                      <property role="TrG5h" value="node" />
-                                      <node concept="3Tqbb2" id="4n$QnzZUswx" role="1tU5fm" />
-                                      <node concept="37vLTw" id="4n$QnzZUsy5" role="33vP2m">
-                                        <ref role="3cqZAo" node="1pPth$lD$Ft" resolve="root" />
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-                                      <property role="TrG5h" value="nameHint" />
-                                      <node concept="17QB3L" id="78CwJJcTyWL" role="1tU5fm" />
-                                      <node concept="2OqwBi" id="1pPth$l_Zf7" role="33vP2m">
-                                        <node concept="1PxgMI" id="1pPth$l_Zf8" role="2Oq$k0">
-                                          <property role="1BlNFB" value="true" />
-                                          <node concept="37vLTw" id="7y50OW6U33L" role="1m5AlR">
-                                            <ref role="3cqZAo" node="4n$QnzZUsy4" resolve="node" />
-                                          </node>
-                                          <node concept="chp4Y" id="6fXjIfxgngI" role="3oSUPX">
-                                            <ref role="cht4Q" to="tpck:h0TrEE$" resolve="INamedConcept" />
-                                          </node>
-                                        </node>
-                                        <node concept="3TrcHB" id="1pPth$l_Zfa" role="2OqNvi">
-                                          <ref role="3TsBF5" to="tpck:h0TrG11" resolve="name" />
-                                        </node>
-                                      </node>
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-                                      <node concept="3clFbF" id="1fBcxRyfRf7" role="3cqZAp">
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-                                            <ref role="3cqZAo" node="78CwJJcTyWt" resolve="nameHint" />
-                                          </node>
-                                          <node concept="2YIFZM" id="1fBcxRygA7u" role="37vLTx">
-                                            <ref role="37wK5l" to="wyt6:~String.valueOf(java.lang.Object):java.lang.String" resolve="valueOf" />
-                                            <ref role="1Pybhc" to="wyt6:~String" resolve="String" />
-                                            <node concept="2OqwBi" id="1fBcxRyggAW" role="37wK5m">
-                                              <node concept="2JrnkZ" id="1fBcxRygeq3" role="2Oq$k0">
-                                                <node concept="37vLTw" id="7y50OW6U33M" role="2JrQYb">
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-                                              </node>
-                                            </node>
-                                          </node>
-                                        </node>
-                                      </node>
-                                    </node>
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-                                      <node concept="10Nm6u" id="1fBcxRyfOsB" role="3uHU7w" />
-                                      <node concept="37vLTw" id="1fBcxRyfJW8" role="3uHU7B">
-                                        <ref role="3cqZAo" node="78CwJJcTyWt" resolve="nameHint" />
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-                                    </node>
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-                                  <node concept="3clFbH" id="3GlpCDSxPUs" role="3cqZAp" />
-                                  <node concept="3clFbF" id="3GlpCDSzA$P" role="3cqZAp">
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-                                        <node concept="Xjq3P" id="3GlpCDSzA$S" role="2Oq$k0" />
-                                        <node concept="2OwXpG" id="3GlpCDSzA$T" role="2OqNvi">
-                                          <ref role="2Oxat5" node="3GlpCDSzA$E" resolve="templatesApplication" />
-                                        </node>
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-                                          <ref role="37wK5l" to="hano:3GlpCDSychS" resolve="TypecheckingTemplates" />
-                                          <node concept="2OqwBi" id="6QH_LDt8BRg" role="37wK5m">
-                                            <node concept="2OqwBi" id="3GlpCDSzA$W" role="2Oq$k0">
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-                                              <node concept="2OwXpG" id="3GlpCDSzA$Y" role="2OqNvi">
-                                                <ref role="2Oxat5" node="1pPth$lA2Na" resolve="mpsProject" />
-                                              </node>
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+                                      <node concept="37vLTw" id="Hg6Enc4Wck" role="37vLTJ">
+                                        <ref role="3cqZAo" node="Hg6Enc4WaS" resolve="result" />
+                                      </node>
+                                    </node>
+                                  </node>
+                                  <node concept="3clFbH" id="Hg6Enc4Wcl" role="3cqZAp" />
+                                </node>
+                              </node>
+                            </node>
+                          </node>
+                        </node>
+                        <node concept="2OqwBi" id="Hg6Enc4Wcm" role="ukAjM">
+                          <node concept="2OqwBi" id="Hg6Enc4Wcn" role="2Oq$k0">
+                            <node concept="Xjq3P" id="Hg6Enc4Wco" role="2Oq$k0">
+                              <ref role="1HBi2w" node="1pPth$l_TFV" resolve="TypecheckingHelper" />
+                            </node>
+                            <node concept="2OwXpG" id="Hg6Enc4Wcp" role="2OqNvi">
+                              <ref role="2Oxat5" node="1pPth$lA2Na" resolve="mpsProject" />
+                            </node>
+                          </node>
+                          <node concept="liA8E" id="Hg6Enc4Wcq" role="2OqNvi">
+                            <ref role="37wK5l" to="z1c3:~Project.getRepository():org.jetbrains.mps.openapi.module.SRepository" resolve="getRepository" />
+                          </node>
+                        </node>
+                      </node>
+                      <node concept="3clFbF" id="Hg6Enc4Wd8" role="3cqZAp">
+                        <node concept="37vLTw" id="Hg6Enc4Wd9" role="3clFbG">
+                          <ref role="3cqZAo" node="Hg6Enc4WaS" resolve="result" />
+                        </node>
+                      </node>
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-                  <node concept="2YIFZM" id="5mg4ZgLbDWj" role="37wK5m">
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                   </node>
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+              <node concept="liA8E" id="Hg6Enc53Ch" role="2OqNvi">
+                <ref role="37wK5l" to="unkn:~Single.map(io.reactivex.functions.Function):io.reactivex.Single" resolve="map" />
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+                    <node concept="3uibUv" id="Hg6Enc59Yp" role="1tU5fm">
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+                      <node concept="3clFbS" id="Hg6Enc5pLQ" role="3clFbx">
+                        <node concept="3clFbF" id="Hg6Enc5pLR" role="3cqZAp">
+                          <node concept="1rXfSq" id="Hg6Enc5pLS" role="3clFbG">
                             <ref role="37wK5l" node="7dgRGU4Nmfr" resolve="done" />
-                            <node concept="3clFbT" id="6i42QSsn4Ah" role="37wK5m">
+                            <node concept="3clFbT" id="Hg6Enc5pLT" role="37wK5m">
                               <property role="3clFbU" value="true" />
                             </node>
                           </node>
                         </node>
-                        <node concept="3clFbH" id="6i42QSsn5cz" role="3cqZAp" />
+                        <node concept="3clFbH" id="Hg6Enc5pLU" role="3cqZAp" />
                       </node>
-                      <node concept="2OqwBi" id="6i42QSsn2RG" role="3clFbw">
-                        <node concept="37vLTw" id="6i42QSsn2hL" role="2Oq$k0">
-                          <ref role="3cqZAo" node="2mbQB8JamBt" resolve="result" />
+                      <node concept="2OqwBi" id="Hg6Enc5pLV" role="3clFbw">
+                        <node concept="37vLTw" id="Hg6Enc5pLW" role="2Oq$k0">
+                          <ref role="3cqZAo" node="Hg6Enc59f7" resolve="result" />
                         </node>
-                        <node concept="liA8E" id="6i42QSsn3dc" role="2OqNvi">
+                        <node concept="liA8E" id="Hg6Enc5pLX" role="2OqNvi">
                           <ref role="37wK5l" to="hano:7Oc59RS_hsj" resolve="isSuccessful" />
                         </node>
                       </node>
-                      <node concept="9aQIb" id="6i42QSsn53n" role="9aQIa">
-                        <node concept="3clFbS" id="6i42QSsn53o" role="9aQI4">
-                          <node concept="34ab3g" id="1zsTePWYw3q" role="3cqZAp">
+                      <node concept="9aQIb" id="Hg6Enc5pLY" role="9aQIa">
+                        <node concept="3clFbS" id="Hg6Enc5pLZ" role="9aQI4">
+                          <node concept="34ab3g" id="Hg6Enc5pM0" role="3cqZAp">
                             <property role="35gtTG" value="warn" />
                             <property role="34fQS0" value="true" />
-                            <node concept="Xl_RD" id="1zsTePWYw3s" role="34bqiv">
+                            <node concept="Xl_RD" id="Hg6Enc5pM1" role="34bqiv">
                               <property role="Xl_RC" value="Error while applying templates" />
                             </node>
-                            <node concept="2OqwBi" id="1zsTePWZJHx" role="34bMjA">
-                              <node concept="2OqwBi" id="1zsTePWYMZ9" role="2Oq$k0">
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-                                  <node concept="10QFUN" id="1zsTePWYLLm" role="1eOMHV">
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-                                      <node concept="3uibUv" id="1zsTePWZJwH" role="A3Ik2">
+                            <node concept="2OqwBi" id="Hg6Enc5pM2" role="34bMjA">
+                              <node concept="2OqwBi" id="Hg6Enc5pM3" role="2Oq$k0">
+                                <node concept="1eOMI4" id="Hg6Enc5pM4" role="2Oq$k0">
+                                  <node concept="10QFUN" id="Hg6Enc5pM5" role="1eOMHV">
+                                    <node concept="A3Dl8" id="Hg6Enc5pM6" role="10QFUM">
+                                      <node concept="3uibUv" id="Hg6Enc5pM7" role="A3Ik2">
                                         <ref role="3uigEE" to="hano:6i42QSs$lgC" resolve="Result.ReportedError" />
                                       </node>
                                     </node>
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-                                        <ref role="3cqZAo" node="2mbQB8JamBt" resolve="result" />
+                                    <node concept="2OqwBi" id="Hg6Enc5pM8" role="10QFUP">
+                                      <node concept="37vLTw" id="Hg6Enc5pM9" role="2Oq$k0">
+                                        <ref role="3cqZAo" node="Hg6Enc59f7" resolve="result" />
                                       </node>
-                                      <node concept="liA8E" id="1zsTePWYLLt" role="2OqNvi">
+                                      <node concept="liA8E" id="Hg6Enc5pMa" role="2OqNvi">
                                         <ref role="37wK5l" to="hano:7Oc59RSEnG3" resolve="errors" />
                                       </node>
                                     </node>
                                   </node>
                                 </node>
-                                <node concept="1uHKPH" id="1zsTePWYNlK" role="2OqNvi" />
+                                <node concept="1uHKPH" id="Hg6Enc5pMb" role="2OqNvi" />
                               </node>
-                              <node concept="liA8E" id="1zsTePWZJWj" role="2OqNvi">
+                              <node concept="liA8E" id="Hg6Enc5pMc" role="2OqNvi">
                                 <ref role="37wK5l" to="hano:6i42QSs$lhc" resolve="exception" />
                               </node>
                             </node>
                           </node>
-                          <node concept="3clFbF" id="6i42QSsn5Dz" role="3cqZAp">
-                            <node concept="1rXfSq" id="6i42QSsn5Dy" role="3clFbG">
+                          <node concept="3clFbF" id="Hg6Enc5pMd" role="3cqZAp">
+                            <node concept="1rXfSq" id="Hg6Enc5pMe" role="3clFbG">
                               <ref role="37wK5l" node="7dgRGU4MD7E" resolve="done" />
-                              <node concept="3clFbT" id="6i42QSsn5T5" role="37wK5m">
+                              <node concept="3clFbT" id="Hg6Enc5pMf" role="37wK5m">
                                 <property role="3clFbU" value="false" />
                               </node>
-                              <node concept="3clFbT" id="6i42QSsn6s5" role="37wK5m">
+                              <node concept="3clFbT" id="Hg6Enc5pMg" role="37wK5m">
                                 <property role="3clFbU" value="false" />
                               </node>
-                              <node concept="2OqwBi" id="6i42QSsn76N" role="37wK5m">
-                                <node concept="37vLTw" id="6i42QSsn6Lz" role="2Oq$k0">
-                                  <ref role="3cqZAo" node="2mbQB8JamBt" resolve="result" />
+                              <node concept="2OqwBi" id="Hg6Enc5pMh" role="37wK5m">
+                                <node concept="37vLTw" id="Hg6Enc5pMi" role="2Oq$k0">
+                                  <ref role="3cqZAo" node="Hg6Enc59f7" resolve="result" />
                                 </node>
-                                <node concept="liA8E" id="6i42QSsoeTH" role="2OqNvi">
+                                <node concept="liA8E" id="Hg6Enc5pMj" role="2OqNvi">
                                   <ref role="37wK5l" to="hano:6i42QSsna8j" resolve="message" />
                                 </node>
                               </node>
@@ -5473,21 +5769,22 @@
                         </node>
                       </node>
                     </node>
-                  </node>
-                  <node concept="37vLTG" id="2mbQB8JamBt" role="1bW2Oz">
-                    <property role="TrG5h" value="result" />
-                    <node concept="3uibUv" id="2mbQB8JanMR" role="1tU5fm">
-                      <ref role="3uigEE" to="hano:7Oc59RSEjdb" resolve="Result" />
+                    <node concept="3clFbH" id="Hg6Enc5ysw" role="3cqZAp" />
+                    <node concept="3clFbF" id="Hg6Enc5wOa" role="3cqZAp">
+                      <node concept="Xjq3P" id="Hg6Enc5wO8" role="3clFbG" />
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                   </node>
                 </node>
               </node>
             </node>
           </node>
-          <node concept="3clFbH" id="2mbQB8J92kP" role="3cqZAp" />
+          <node concept="3clFbH" id="Hg6Enc44j_" role="3cqZAp" />
+        </node>
+        <node concept="2AHcQZ" id="Hg6Enc3ZK5" role="2AJF6D">
+          <ref role="2AI5Lk" to="wyt6:~Override" resolve="Override" />
         </node>
       </node>
-      <node concept="2tJIrI" id="1pPth$lAXYe" role="jymVt" />
+      <node concept="2tJIrI" id="Hg6Enc44mH" role="jymVt" />
       <node concept="3clFb_" id="20Ay2VeR9qk" role="jymVt">
         <property role="TrG5h" value="ruleTemplates" />
         <node concept="3Tm1VV" id="20Ay2VeR9qm" role="1B3o_S" />
@@ -5530,8 +5827,8 @@
       <node concept="2tJIrI" id="4n$Qn$06m1p" role="jymVt" />
       <node concept="3uibUv" id="1pPth$lACR_" role="1zkMxy">
         <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
-        <node concept="3uibUv" id="1pPth$lE5hW" role="11_B2D">
-          <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
+        <node concept="3uibUv" id="Hg6Enc_hBn" role="11_B2D">
+          <ref role="3uigEE" node="Hg6Enc_35l" resolve="TypecheckingHelper.Init" />
         </node>
       </node>
       <node concept="312cEg" id="1pPth$lD$Ft" role="jymVt">
@@ -5610,889 +5907,962 @@
         </node>
       </node>
       <node concept="2tJIrI" id="3F6vMxq_0xa" role="jymVt" />
-      <node concept="3clFb_" id="1pPth$lBP4o" role="jymVt">
-        <property role="TrG5h" value="execute" />
+      <node concept="3clFb_" id="Hg6Enc6pha" role="jymVt">
+        <property role="TrG5h" value="schedule" />
         <property role="1EzhhJ" value="false" />
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-          <property role="TrG5h" value="prev" />
-          <node concept="3uibUv" id="1N_0WA5GG19" role="1tU5fm">
-            <ref role="3uigEE" node="1pPth$lAwc0" resolve="TypecheckingHelper.ApplyTemplatesStep" />
+        <node concept="37vLTG" id="Hg6Enc6phb" role="3clF46">
+          <property role="TrG5h" value="prevStep" />
+          <node concept="3uibUv" id="Hg6Enc6phc" role="1tU5fm">
+            <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+            <node concept="3uibUv" id="Hg6Enc6phj" role="11_B2D">
+              <ref role="3uigEE" node="1pPth$lAwc0" resolve="TypecheckingHelper.ApplyTemplatesStep" />
+            </node>
           </node>
         </node>
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+                            <node concept="37vLTw" id="Hg6Enc9_Rf" role="1LFl5Q">
+                              <ref role="3cqZAo" node="Hg6Enc8tAo" resolve="prev_trace" />
+                            </node>
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+                      <node concept="3cpWs8" id="Hg6Enc7CNR" role="3cqZAp">
+                        <node concept="3cpWsn" id="Hg6Enc7CNS" role="3cpWs9">
+                          <property role="TrG5h" value="ok_cont_err" />
+                          <property role="3TUv4t" value="false" />
+                          <node concept="1LlUBW" id="Hg6Enc7CNT" role="1tU5fm">
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+                            <node concept="3clFbT" id="Hg6Enc7CNY" role="1Lso8e">
+                              <property role="3clFbU" value="true" />
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+                            <node concept="3clFbT" id="Hg6Enc7CNZ" role="1Lso8e">
+                              <property role="3clFbU" value="true" />
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+                            <node concept="37vLTw" id="Hg6Enc9a3K" role="2Oq$k0">
+                              <ref role="3cqZAo" node="Hg6Enc9a3G" resolve="prev" />
+                            </node>
+                            <node concept="liA8E" id="Hg6Enc7CO6" role="2OqNvi">
+                              <ref role="37wK5l" node="20Ay2VeQRdx" resolve="typeTemplates" />
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+                        <node concept="3cpWsn" id="Hg6Enc7COk" role="3cpWs9">
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+                          <node concept="10Oyi0" id="Hg6Enc7COl" role="1tU5fm" />
+                          <node concept="3cmrfG" id="Hg6Enc7COm" role="33vP2m">
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+                                <ref role="1Pybhc" to="wyt6:~Integer" resolve="Integer" />
+                                <ref role="37wK5l" to="wyt6:~Integer.parseUnsignedInt(java.lang.String):int" resolve="parseUnsignedInt" />
+                                <node concept="2YIFZM" id="Hg6Enc7COs" role="37wK5m">
+                                  <ref role="1Pybhc" to="wyt6:~System" resolve="System" />
+                                  <ref role="37wK5l" to="wyt6:~System.getProperty(java.lang.String,java.lang.String):java.lang.String" resolve="getProperty" />
+                                  <node concept="Xl_RD" id="Hg6Enc7COt" role="37wK5m">
+                                    <property role="Xl_RC" value="logic.timeout" />
+                                  </node>
+                                  <node concept="Xl_RD" id="Hg6Enc7COu" role="37wK5m">
+                                    <property role="Xl_RC" value="30" />
+                                  </node>
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+                              <node concept="37vLTw" id="Hg6Enc7COv" role="37vLTJ">
+                                <ref role="3cqZAo" node="Hg6Enc7COk" resolve="timeoutSec" />
+                              </node>
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+                        <node concept="TDmWw" id="Hg6Enc7COw" role="TEbGg">
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+                              <ref role="3uigEE" to="wyt6:~NumberFormatException" resolve="NumberFormatException" />
+                            </node>
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+                      <node concept="3cpWs8" id="Hg6Enc7CO$" role="3cqZAp">
+                        <node concept="3cpWsn" id="Hg6Enc7CO_" role="3cpWs9">
+                          <property role="TrG5h" value="timeoutMillis" />
+                          <property role="3TUv4t" value="true" />
+                          <node concept="10Oyi0" id="Hg6Enc7COA" role="1tU5fm" />
+                          <node concept="17qRlL" id="Hg6Enc7COB" role="33vP2m">
+                            <node concept="3cmrfG" id="Hg6Enc7COC" role="3uHU7w">
+                              <property role="3cmrfH" value="1000" />
+                            </node>
+                            <node concept="37vLTw" id="Hg6Enc7COD" role="3uHU7B">
+                              <ref role="3cqZAo" node="Hg6Enc7COk" resolve="timeoutSec" />
+                            </node>
+                          </node>
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+                      <node concept="3cpWs8" id="Hg6Enc7COE" role="3cqZAp">
+                        <node concept="3cpWsn" id="Hg6Enc7COF" role="3cpWs9">
+                          <property role="TrG5h" value="startTime" />
+                          <property role="3TUv4t" value="true" />
+                          <node concept="3cpWsb" id="Hg6Enc7COG" role="1tU5fm" />
+                          <node concept="2YIFZM" id="Hg6Enc7COH" role="33vP2m">
+                            <ref role="37wK5l" to="wyt6:~System.currentTimeMillis():long" resolve="currentTimeMillis" />
+                            <ref role="1Pybhc" to="wyt6:~System" resolve="System" />
+                          </node>
+                        </node>
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+                      <node concept="3cpWs8" id="Hg6Enc7COI" role="3cqZAp">
+                        <node concept="3cpWsn" id="Hg6Enc7COJ" role="3cpWs9">
+                          <property role="TrG5h" value="timeoutBreaker" />
+                          <property role="3TUv4t" value="true" />
+                          <node concept="3uibUv" id="Hg6Enc7COK" role="1tU5fm">
+                            <ref role="3uigEE" to="yg8f:15BaR5AeJIv" resolve="EvaluationTraceExt.Stub" />
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+                          <node concept="3K4zz7" id="Hg6Enc7COL" role="33vP2m">
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+                              <node concept="37vLTw" id="Hg6Enc7COQ" role="3uHU7B">
+                                <ref role="3cqZAo" node="Hg6Enc7COk" resolve="timeoutSec" />
+                              </node>
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+                            <node concept="2ShNRf" id="Hg6Enc7COR" role="3K4E3e">
+                              <node concept="YeOm9" id="Hg6Enc7COS" role="2ShVmc">
+                                <node concept="1Y3b0j" id="Hg6Enc7COT" role="YeSDq">
+                                  <property role="2bfB8j" value="true" />
+                                  <ref role="1Y3XeK" to="yg8f:15BaR5AeJIv" resolve="EvaluationTraceExt.Stub" />
+                                  <ref role="37wK5l" to="wyt6:~Object.&lt;init&gt;()" resolve="Object" />
+                                  <node concept="3Tm1VV" id="Hg6Enc7COU" role="1B3o_S" />
+                                  <node concept="3clFb_" id="Hg6Enc7COV" role="jymVt">
+                                    <property role="1EzhhJ" value="false" />
+                                    <property role="TrG5h" value="activate" />
+                                    <node concept="37vLTG" id="Hg6Enc7COW" role="3clF46">
+                                      <property role="TrG5h" value="occurrence" />
+                                      <node concept="3uibUv" id="Hg6Enc7COX" role="1tU5fm">
+                                        <ref role="3uigEE" to="w7la:~ConstraintOccurrence" resolve="ConstraintOccurrence" />
+                                      </node>
+                                    </node>
+                                    <node concept="3cqZAl" id="Hg6Enc7COY" role="3clF45" />
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+                                      <ref role="2AI5Lk" to="wyt6:~Override" resolve="Override" />
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+                                          <node concept="3cpWsd" id="Hg6Enc7CP5" role="3uHU7B">
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+                                              <ref role="1Pybhc" to="wyt6:~System" resolve="System" />
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+                                            <node concept="37vLTw" id="Hg6Enc7CP7" role="3uHU7w">
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+                                              <node concept="1pGfFk" id="Hg6Enc7CPb" role="2ShVmc">
+                                                <ref role="37wK5l" to="w7la:~EvaluationFailureException.&lt;init&gt;(java.lang.String)" resolve="EvaluationFailureException" />
+                                                <node concept="Xl_RD" id="Hg6Enc7CPc" role="37wK5m">
+                                                  <property role="Xl_RC" value="Timeout" />
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+                                          </node>
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+                                    <ref role="3cqZAo" node="3jXBvmTKutv" resolve="ONLY_INFO" />
+                                    <ref role="1PxDUh" node="4i4XGQZlbGA" resolve="MessageViewTracer" />
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+                                <property role="TrG5h" value="root" />
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+                                <property role="TrG5h" value="sessionSolver" />
+                                <node concept="3uibUv" id="Hg6Enc7CPv" role="1tU5fm">
+                                  <ref role="3uigEE" to="w7la:~SessionSolver" resolve="SessionSolver" />
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+                                <node concept="1rXfSq" id="Hg6Enc7CPw" role="33vP2m">
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+                                    <node concept="2OwXpG" id="Hg6Enc7CPz" role="2OqNvi">
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+                              <node concept="3cpWsn" id="Hg6Enc7CP_" role="3cpWs9">
+                                <property role="TrG5h" value="programs" />
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+                                            <ref role="3cqZAo" node="Hg6Enc7CPS" resolve="result" />
+                                          </node>
+                                          <node concept="liA8E" id="Hg6Enc7CQi" role="2OqNvi">
+                                            <ref role="37wK5l" to="hano:7nkyKX7v7xb" resolve="and" />
+                                            <node concept="2OqwBi" id="Hg6Enc7CQj" role="37wK5m">
+                                              <node concept="37vLTw" id="Hg6Enc7CQk" role="2Oq$k0">
+                                                <ref role="3cqZAo" node="Hg6Enc7CPL" resolve="progEval" />
+                                              </node>
+                                              <node concept="liA8E" id="Hg6Enc7CQl" role="2OqNvi">
+                                                <ref role="37wK5l" to="hano:HV6urVFrQ9" resolve="eval" />
+                                                <node concept="37vLTw" id="Hg6Enc7CQm" role="37wK5m">
+                                                  <ref role="3cqZAo" node="Hg6Enc7CQ8" resolve="config" />
+                                                </node>
+                                                <node concept="37vLTw" id="Hg6Enc7CQn" role="37wK5m">
+                                                  <ref role="3cqZAo" node="Hg6Enc7CPZ" resolve="multitrace" />
+                                                </node>
+                                              </node>
+                                            </node>
+                                          </node>
+                                        </node>
+                                      </node>
+                                    </node>
+                                    <node concept="3clFbH" id="Hg6Enc7CQo" role="3cqZAp" />
+                                    <node concept="3clFbJ" id="Hg6Enc7CQp" role="3cqZAp">
+                                      <node concept="3fqX7Q" id="Hg6Enc7CQq" role="3clFbw">
+                                        <node concept="2OqwBi" id="Hg6Enc7CQr" role="3fr31v">
+                                          <node concept="37vLTw" id="Hg6Enc7CQs" role="2Oq$k0">
+                                            <ref role="3cqZAo" node="Hg6Enc7CPS" resolve="result" />
+                                          </node>
+                                          <node concept="liA8E" id="Hg6Enc7CQt" role="2OqNvi">
+                                            <ref role="37wK5l" to="hano:7Oc59RS_hsj" resolve="isSuccessful" />
+                                          </node>
+                                        </node>
+                                      </node>
+                                      <node concept="3clFbS" id="Hg6Enc7CQu" role="3clFbx">
+                                        <node concept="3clFbF" id="Hg6Enc7CQv" role="3cqZAp">
+                                          <node concept="2OqwBi" id="Hg6Enc7CQw" role="3clFbG">
+                                            <node concept="37vLTw" id="Hg6Enc7CQx" role="2Oq$k0">
+                                              <ref role="3cqZAo" node="3F6vMxqv_px" resolve="msgtrace" />
+                                            </node>
+                                            <node concept="liA8E" id="Hg6Enc7CQy" role="2OqNvi">
+                                              <ref role="37wK5l" node="3GlpCDSFXUG" resolve="warning" />
+                                              <node concept="2OqwBi" id="Hg6Enc7CQz" role="37wK5m">
+                                                <node concept="37vLTw" id="Hg6Enc7CQ$" role="2Oq$k0">
+                                                  <ref role="3cqZAo" node="Hg6Enc7CPS" resolve="result" />
+                                                </node>
+                                                <node concept="liA8E" id="Hg6Enc7CQ_" role="2OqNvi">
+                                                  <ref role="37wK5l" to="hano:6i42QSsna8j" resolve="message" />
+                                                </node>
+                                              </node>
+                                            </node>
+                                          </node>
+                                        </node>
+                                        <node concept="3clFbF" id="Hg6Enc7CQA" role="3cqZAp">
+                                          <node concept="37vLTI" id="Hg6Enc7CQB" role="3clFbG">
+                                            <node concept="3clFbT" id="Hg6Enc7CQC" role="37vLTx">
+                                              <property role="3clFbU" value="false" />
+                                            </node>
+                                            <node concept="1LFfDK" id="Hg6Enc7CQD" role="37vLTJ">
+                                              <node concept="3cmrfG" id="Hg6Enc7CQE" role="1LF_Uc">
+                                                <property role="3cmrfH" value="0" />
+                                              </node>
+                                              <node concept="37vLTw" id="Hg6Enc7CQF" role="1LFl5Q">
+                                                <ref role="3cqZAo" node="Hg6Enc7CNS" resolve="ok_cont_err" />
+                                              </node>
+                                            </node>
+                                          </node>
+                                        </node>
+                                        <node concept="3clFbF" id="Hg6Enc7CQG" role="3cqZAp">
+                                          <node concept="37vLTI" id="Hg6Enc7CQH" role="3clFbG">
+                                            <node concept="3clFbT" id="Hg6Enc7CQI" role="37vLTx">
+                                              <property role="3clFbU" value="true" />
+                                            </node>
+                                            <node concept="1LFfDK" id="Hg6Enc7CQJ" role="37vLTJ">
+                                              <node concept="3cmrfG" id="Hg6Enc7CQK" role="1LF_Uc">
+                                                <property role="3cmrfH" value="1" />
+                                              </node>
+                                              <node concept="37vLTw" id="Hg6Enc7CQL" role="1LFl5Q">
+                                                <ref role="3cqZAo" node="Hg6Enc7CNS" resolve="ok_cont_err" />
+                                              </node>
+                                            </node>
+                                          </node>
+                                        </node>
+                                        <node concept="3clFbF" id="Hg6Enc7CQM" role="3cqZAp">
+                                          <node concept="37vLTI" id="Hg6Enc7CQN" role="3clFbG">
+                                            <node concept="1LFfDK" id="Hg6Enc7CQO" role="37vLTJ">
+                                              <node concept="3cmrfG" id="Hg6Enc7CQP" role="1LF_Uc">
+                                                <property role="3cmrfH" value="2" />
+                                              </node>
+                                              <node concept="37vLTw" id="Hg6Enc7CQQ" role="1LFl5Q">
+                                                <ref role="3cqZAo" node="Hg6Enc7CNS" resolve="ok_cont_err" />
+                                              </node>
+                                            </node>
+                                            <node concept="2OqwBi" id="Hg6Enc7CQR" role="37vLTx">
+                                              <node concept="37vLTw" id="Hg6Enc7CQS" role="2Oq$k0">
+                                                <ref role="3cqZAo" node="Hg6Enc7CPS" resolve="result" />
+                                              </node>
+                                              <node concept="liA8E" id="Hg6Enc7CQT" role="2OqNvi">
+                                                <ref role="37wK5l" to="hano:6i42QSsna8j" resolve="message" />
+                                              </node>
+                                            </node>
+                                          </node>
+                                        </node>
+                                        <node concept="3zACq4" id="Hg6Enc7CQU" role="3cqZAp" />
+                                      </node>
+                                    </node>
+                                  </node>
+                                  <node concept="3cpWsn" id="Hg6Enc7CQV" role="1Duv9x">
+                                    <property role="TrG5h" value="program" />
+                                    <node concept="3uibUv" id="Hg6Enc7CQW" role="1tU5fm">
+                                      <ref role="3uigEE" to="av0y:~Program" resolve="Program" />
+                                    </node>
+                                  </node>
+                                  <node concept="37vLTw" id="Hg6Enc7CQX" role="1DdaDG">
+                                    <ref role="3cqZAo" node="Hg6Enc7CP_" resolve="programs" />
+                                  </node>
+                                </node>
+                                <node concept="3clFbH" id="Hg6Enc7CQY" role="3cqZAp" />
+                                <node concept="3clFbF" id="Hg6Enc7CQZ" role="3cqZAp">
+                                  <node concept="37vLTI" id="Hg6Enc7CR0" role="3clFbG">
+                                    <node concept="2OqwBi" id="Hg6Enc7CR1" role="37vLTJ">
+                                      <node concept="Xjq3P" id="Hg6Enc7CR2" role="2Oq$k0" />
+                                      <node concept="2OwXpG" id="Hg6Enc7CR3" role="2OqNvi">
+                                        <ref role="2Oxat5" node="1CcQBrQoJoP" resolve="storeView" />
+                                      </node>
+                                    </node>
+                                    <node concept="2OqwBi" id="Hg6Enc7CR4" role="37vLTx">
+                                      <node concept="37vLTw" id="Hg6Enc7CR5" role="2Oq$k0">
+                                        <ref role="3cqZAo" node="Hg6Enc7CPL" resolve="progEval" />
+                                      </node>
+                                      <node concept="liA8E" id="Hg6Enc7CR6" role="2OqNvi">
+                                        <ref role="37wK5l" to="hano:5cnt3vh3pb_" resolve="storeView" />
+                                      </node>
+                                    </node>
+                                  </node>
+                                </node>
+                                <node concept="3clFbH" id="Hg6Enc7CR7" role="3cqZAp" />
+                              </node>
+                              <node concept="TDmWw" id="Hg6Enc7CR8" role="TEXxN">
+                                <node concept="3cpWsn" id="Hg6Enc7CR9" role="TDEfY">
+                                  <property role="TrG5h" value="e" />
+                                  <node concept="3uibUv" id="Hg6Enc7CRa" role="1tU5fm">
+                                    <ref role="3uigEE" to="wyt6:~RuntimeException" resolve="RuntimeException" />
+                                  </node>
+                                </node>
+                                <node concept="3clFbS" id="Hg6Enc7CRb" role="TDEfX">
+                                  <node concept="34ab3g" id="Hg6Enc7CRc" role="3cqZAp">
+                                    <property role="35gtTG" value="error" />
+                                    <property role="34fQS0" value="true" />
+                                    <node concept="Xl_RD" id="Hg6Enc7CRd" role="34bqiv">
+                                      <property role="Xl_RC" value="exception during evaluation" />
+                                    </node>
+                                    <node concept="37vLTw" id="Hg6Enc7CRe" role="34bMjA">
+                                      <ref role="3cqZAo" node="Hg6Enc7CR9" resolve="e" />
+                                    </node>
+                                  </node>
+                                  <node concept="3clFbF" id="Hg6Enc7CRf" role="3cqZAp">
+                                    <node concept="2OqwBi" id="Hg6Enc7CRg" role="3clFbG">
+                                      <node concept="37vLTw" id="Hg6Enc7CRh" role="2Oq$k0">
+                                        <ref role="3cqZAo" node="3F6vMxqv_px" resolve="msgtrace" />
+                                      </node>
+                                      <node concept="liA8E" id="Hg6Enc7CRi" role="2OqNvi">
+                                        <ref role="37wK5l" node="623frvFBcwl" resolve="warning" />
+                                        <node concept="2OqwBi" id="Hg6Enc7CRj" role="37wK5m">
+                                          <node concept="37vLTw" id="Hg6Enc7CRk" role="2Oq$k0">
+                                            <ref role="3cqZAo" node="Hg6Enc7CR9" resolve="e" />
+                                          </node>
+                                          <node concept="liA8E" id="Hg6Enc7CRl" role="2OqNvi">
+                                            <ref role="37wK5l" to="wyt6:~Throwable.getMessage():java.lang.String" resolve="getMessage" />
+                                          </node>
+                                        </node>
+                                        <node concept="37vLTw" id="Hg6Enc7CRm" role="37wK5m">
+                                          <ref role="3cqZAo" node="Hg6Enc7CR9" resolve="e" />
+                                        </node>
+                                      </node>
+                                    </node>
+                                  </node>
+                                  <node concept="3clFbF" id="Hg6Enc7CRn" role="3cqZAp">
+                                    <node concept="37vLTI" id="Hg6Enc7CRo" role="3clFbG">
+                                      <node concept="3clFbT" id="Hg6Enc7CRp" role="37vLTx">
+                                        <property role="3clFbU" value="false" />
+                                      </node>
+                                      <node concept="1LFfDK" id="Hg6Enc7CRq" role="37vLTJ">
+                                        <node concept="3cmrfG" id="Hg6Enc7CRr" role="1LF_Uc">
+                                          <property role="3cmrfH" value="0" />
+                                        </node>
+                                        <node concept="37vLTw" id="Hg6Enc7CRs" role="1LFl5Q">
+                                          <ref role="3cqZAo" node="Hg6Enc7CNS" resolve="ok_cont_err" />
+                                        </node>
+                                      </node>
+                                    </node>
+                                  </node>
+                                  <node concept="3clFbF" id="Hg6Enc7CRt" role="3cqZAp">
+                                    <node concept="37vLTI" id="Hg6Enc7CRu" role="3clFbG">
+                                      <node concept="3clFbT" id="Hg6Enc7CRv" role="37vLTx">
+                                        <property role="3clFbU" value="false" />
+                                      </node>
+                                      <node concept="1LFfDK" id="Hg6Enc7CRw" role="37vLTJ">
+                                        <node concept="3cmrfG" id="Hg6Enc7CRx" role="1LF_Uc">
+                                          <property role="3cmrfH" value="1" />
+                                        </node>
+                                        <node concept="37vLTw" id="Hg6Enc7CRy" role="1LFl5Q">
+                                          <ref role="3cqZAo" node="Hg6Enc7CNS" resolve="ok_cont_err" />
+                                        </node>
+                                      </node>
+                                    </node>
+                                  </node>
+                                  <node concept="3clFbF" id="Hg6Enc7CRz" role="3cqZAp">
+                                    <node concept="37vLTI" id="Hg6Enc7CR$" role="3clFbG">
+                                      <node concept="1LFfDK" id="Hg6Enc7CR_" role="37vLTJ">
+                                        <node concept="3cmrfG" id="Hg6Enc7CRA" role="1LF_Uc">
+                                          <property role="3cmrfH" value="2" />
+                                        </node>
+                                        <node concept="37vLTw" id="Hg6Enc7CRB" role="1LFl5Q">
+                                          <ref role="3cqZAo" node="Hg6Enc7CNS" resolve="ok_cont_err" />
+                                        </node>
+                                      </node>
+                                      <node concept="2OqwBi" id="Hg6Enc7CRC" role="37vLTx">
+                                        <node concept="37vLTw" id="Hg6Enc7CRD" role="2Oq$k0">
+                                          <ref role="3cqZAo" node="Hg6Enc7CR9" resolve="e" />
+                                        </node>
+                                        <node concept="liA8E" id="Hg6Enc7CRE" role="2OqNvi">
+                                          <ref role="37wK5l" to="wyt6:~Throwable.getMessage():java.lang.String" resolve="getMessage" />
+                                        </node>
+                                      </node>
+                                    </node>
+                                  </node>
+                                  <node concept="3clFbH" id="Hg6Enc7CRF" role="3cqZAp" />
+                                </node>
+                              </node>
+                              <node concept="3clFbS" id="Hg6Enc7CRG" role="2GVbov">
+                                <node concept="3clFbF" id="Hg6Enc7CRH" role="3cqZAp">
+                                  <node concept="1rXfSq" id="Hg6Enc7CRI" role="3clFbG">
+                                    <ref role="37wK5l" node="3F6vMxqj$oM" resolve="deinitSession" />
+                                  </node>
+                                </node>
+                              </node>
+                            </node>
+                          </node>
+                        </node>
+                        <node concept="2OqwBi" id="Hg6Enc7CRJ" role="ukAjM">
+                          <node concept="2OqwBi" id="Hg6Enc7CRK" role="2Oq$k0">
+                            <node concept="Xjq3P" id="Hg6Enc7CRL" role="2Oq$k0">
+                              <ref role="1HBi2w" node="1pPth$l_TFV" resolve="TypecheckingHelper" />
+                            </node>
+                            <node concept="2OwXpG" id="Hg6Enc7CRM" role="2OqNvi">
+                              <ref role="2Oxat5" node="1pPth$lA2Na" resolve="mpsProject" />
+                            </node>
+                          </node>
+                          <node concept="liA8E" id="Hg6Enc7CRN" role="2OqNvi">
+                            <ref role="37wK5l" to="z1c3:~Project.getRepository():org.jetbrains.mps.openapi.module.SRepository" resolve="getRepository" />
+                          </node>
+                        </node>
+                      </node>
+                      <node concept="3clFbF" id="Hg6Enc7CSk" role="3cqZAp">
+                        <node concept="37vLTw" id="Hg6Enc7CSl" role="3clFbG">
+                          <ref role="3cqZAo" node="Hg6Enc7CNS" resolve="ok_cont_err" />
+                        </node>
+                      </node>
+                      <node concept="3clFbH" id="Hg6EncbdAp" role="3cqZAp" />
+                    </node>
+                    <node concept="37vLTG" id="Hg6Enc8tAo" role="1bW2Oz">
+                      <property role="TrG5h" value="prev_trace" />
+                      <node concept="1LlUBW" id="Hg6Enc8tAn" role="1tU5fm">
+                        <node concept="3uibUv" id="Hg6Enc8A8x" role="1Lm7xW">
+                          <ref role="3uigEE" node="1pPth$lAwc0" resolve="TypecheckingHelper.ApplyTemplatesStep" />
+                        </node>
+                        <node concept="3uibUv" id="Hg6Enc8DQj" role="1Lm7xW">
+                          <ref role="3uigEE" to="yg8f:qubcdtxBiR" resolve="EvaluationTraceExt" />
+                        </node>
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="liA8E" id="Hg6Encaqa2" role="2OqNvi">
+                <ref role="37wK5l" to="unkn:~Single.map(io.reactivex.functions.Function):io.reactivex.Single" resolve="map" />
+                <node concept="1bVj0M" id="Hg6EncaEws" role="37wK5m">
+                  <node concept="37vLTG" id="Hg6EncaEwt" role="1bW2Oz">
+                    <property role="TrG5h" value="ok_cont_err" />
+                    <node concept="1LlUBW" id="Hg6EncaEwu" role="1tU5fm">
+                      <node concept="10P_77" id="Hg6EncaEwv" role="1Lm7xW" />
+                      <node concept="10P_77" id="Hg6EncaEww" role="1Lm7xW" />
+                      <node concept="17QB3L" id="Hg6EncaEwx" role="1Lm7xW" />
+                    </node>
+                  </node>
+                  <node concept="3clFbS" id="Hg6EncaEwy" role="1bW5cS">
+                    <node concept="3clFbH" id="Hg6EncbeZ7" role="3cqZAp" />
+                    <node concept="3clFbF" id="Hg6EncaEwz" role="3cqZAp">
+                      <node concept="1rXfSq" id="Hg6EncaEw$" role="3clFbG">
+                        <ref role="37wK5l" node="7dgRGU4MD7E" resolve="done" />
+                        <node concept="1LFfDK" id="Hg6EncaEw_" role="37wK5m">
+                          <node concept="3cmrfG" id="Hg6EncaEwA" role="1LF_Uc">
+                            <property role="3cmrfH" value="0" />
+                          </node>
+                          <node concept="37vLTw" id="Hg6EncaEwB" role="1LFl5Q">
+                            <ref role="3cqZAo" node="Hg6EncaEwt" resolve="ok_cont_err" />
+                          </node>
+                        </node>
+                        <node concept="1LFfDK" id="Hg6EncaEwC" role="37wK5m">
+                          <node concept="3cmrfG" id="Hg6EncaEwD" role="1LF_Uc">
+                            <property role="3cmrfH" value="1" />
+                          </node>
+                          <node concept="37vLTw" id="Hg6EncaEwE" role="1LFl5Q">
+                            <ref role="3cqZAo" node="Hg6EncaEwt" resolve="ok_cont_err" />
+                          </node>
+                        </node>
+                        <node concept="1LFfDK" id="Hg6EncaEwF" role="37wK5m">
+                          <node concept="3cmrfG" id="Hg6EncaEwG" role="1LF_Uc">
+                            <property role="3cmrfH" value="2" />
+                          </node>
+                          <node concept="37vLTw" id="Hg6EncaEwH" role="1LFl5Q">
+                            <ref role="3cqZAo" node="Hg6EncaEwt" resolve="ok_cont_err" />
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="3clFbF" id="Hg6Encbbe0" role="3cqZAp">
+                      <node concept="Xjq3P" id="Hg6EncbbdY" role="3clFbG" />
+                    </node>
+                    <node concept="3clFbH" id="Hg6EncbhbV" role="3cqZAp" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="3clFbH" id="Hg6Enc6wNU" role="3cqZAp" />
+        </node>
+        <node concept="2AHcQZ" id="Hg6Enc6phl" role="2AJF6D">
+          <ref role="2AI5Lk" to="wyt6:~Override" resolve="Override" />
         </node>
       </node>
-      <node concept="2tJIrI" id="3F6vMxqjAY0" role="jymVt" />
+      <node concept="2tJIrI" id="Hg6Enc6sLX" role="jymVt" />
       <node concept="3clFb_" id="7y50OW6WPl4" role="jymVt">
         <property role="TrG5h" value="getTypeTerm" />
         <node concept="37vLTG" id="7y50OW6X2N5" role="3clF46">
@@ -6743,477 +7113,500 @@
         </node>
       </node>
       <node concept="2tJIrI" id="3F6vMxq_3Wa" role="jymVt" />
-      <node concept="3clFb_" id="1pPth$lC2U5" role="jymVt">
-        <property role="TrG5h" value="execute" />
+      <node concept="2tJIrI" id="Hg6EncbjjT" role="jymVt" />
+      <node concept="3clFb_" id="Hg6EncbkRR" role="jymVt">
+        <property role="TrG5h" value="schedule" />
         <property role="1EzhhJ" value="false" />
-        <node concept="37vLTG" id="1pPth$lGafk" role="3clF46">
-          <property role="TrG5h" value="prev" />
-          <node concept="3uibUv" id="YgAcJaV5RE" role="1tU5fm">
-            <ref role="3uigEE" node="1pPth$lBNWG" resolve="TypecheckingHelper.EvaluateRulesStep" />
+        <node concept="37vLTG" id="Hg6EncbkRS" role="3clF46">
+          <property role="TrG5h" value="prevStep" />
+          <node concept="3uibUv" id="Hg6EncbkRT" role="1tU5fm">
+            <ref role="3uigEE" to="unkn:~Single" resolve="Single" />
+            <node concept="3uibUv" id="Hg6EncbkS0" role="11_B2D">
+              <ref role="3uigEE" node="1pPth$lBNWG" resolve="TypecheckingHelper.EvaluateRulesStep" />
+            </node>
           </node>
         </node>
-        <node concept="3cqZAl" id="1pPth$lC2U8" role="3clF45" />
-        <node concept="3Tm1VV" id="1pPth$lC2U9" role="1B3o_S" />
-        <node concept="3clFbS" id="1pPth$lC2Ub" role="3clF47">
-          <node concept="3clFbH" id="6BIwod95k50" role="3cqZAp" />
-          <node concept="3clFbF" id="2mbQB8J7Ba3" role="3cqZAp">
-            <node concept="2OqwBi" id="2mbQB8JhFqs" role="3clFbG">
-              <node concept="2OqwBi" id="5mg4ZgKX6ta" role="2Oq$k0">
-                <node concept="2OqwBi" id="2mbQB8J7UOL" role="2Oq$k0">
-                  <node concept="2YIFZM" id="2mbQB8J7Ckw" role="2Oq$k0">
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-                                            <ref role="37wK5l" node="5X6ji59xVZa" resolve="refreshActivation" />
+                                        <node concept="liA8E" id="Hg6EncbtWz" role="2OqNvi">
+                                          <ref role="37wK5l" node="6_UQWSXcgLF" resolve="setContextEditorComponent" />
+                                          <node concept="37vLTw" id="Hg6EncbtW$" role="37wK5m">
+                                            <ref role="3cqZAo" node="1pPth$lGU8f" resolve="editorComponent" />
                                           </node>
                                         </node>
                                       </node>
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-                                    <node concept="3cpWsn" id="5cnt3vhcNQX" role="1Duv9x">
-                                      <property role="TrG5h" value="tt" />
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-                                    <node concept="2OqwBi" id="5cnt3vhcNR2" role="1DdaDG">
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-                                      <node concept="2OwXpG" id="5cnt3vhcNR4" role="2OqNvi">
-                                        <ref role="2Oxat5" node="YgAcJaUSxD" resolve="traceTabs" />
+                                    <node concept="3clFbF" id="Hg6EncbtW_" role="3cqZAp">
+                                      <node concept="2OqwBi" id="Hg6EncbtWA" role="3clFbG">
+                                        <node concept="37vLTw" id="Hg6EncbtWB" role="2Oq$k0">
+                                          <ref role="3cqZAo" node="Hg6EncbtWD" resolve="tt" />
+                                        </node>
+                                        <node concept="liA8E" id="Hg6EncbtWC" role="2OqNvi">
+                                          <ref role="37wK5l" node="5X6ji59xVZa" resolve="refreshActivation" />
+                                        </node>
                                       </node>
                                     </node>
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-                                  <node concept="3clFbF" id="YgAcJaV6Xv" role="3cqZAp">
-                                    <node concept="2OqwBi" id="YgAcJaV8gX" role="3clFbG">
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-                                            <ref role="1HBi2w" node="1pPth$l_TFV" resolve="TypecheckingHelper" />
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-                                          <node concept="2OwXpG" id="YgAcJaV6X$" role="2OqNvi">
-                                            <ref role="2Oxat5" node="1pPth$lA2Na" resolve="mpsProject" />
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-                                        </node>
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-                                      <node concept="liA8E" id="YgAcJaV8A5" role="2OqNvi">
-                                        <ref role="37wK5l" node="Nob1E3CTMt" resolve="showTool" />
-                                      </node>
+                                  <node concept="3cpWsn" id="Hg6EncbtWD" role="1Duv9x">
+                                    <property role="TrG5h" value="tt" />
+                                    <node concept="3uibUv" id="Hg6EncbtWE" role="1tU5fm">
+                                      <ref role="3uigEE" node="5X6ji59z5Fa" resolve="TraceTab" />
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-                                <node concept="2OqwBi" id="5cnt3vhcFWb" role="3clFbw">
-                                  <node concept="2OqwBi" id="HV6urVGs8u" role="2Oq$k0">
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-                                      <ref role="3cqZAo" node="1pPth$lGafk" resolve="prev" />
+                                  <node concept="2OqwBi" id="Hg6EncbtWF" role="1DdaDG">
+                                    <node concept="37vLTw" id="Hg6EncbtWG" role="2Oq$k0">
+                                      <ref role="3cqZAo" node="Hg6EncbrFm" resolve="prev" />
                                     </node>
-                                    <node concept="2OwXpG" id="HV6urVGs8w" role="2OqNvi">
+                                    <node concept="2OwXpG" id="Hg6EncbtWH" role="2OqNvi">
                                       <ref role="2Oxat5" node="YgAcJaUSxD" resolve="traceTabs" />
                                     </node>
                                   </node>
-                                  <node concept="3GX2aA" id="5cnt3vhcIbc" role="2OqNvi" />
+                                </node>
+                                <node concept="3clFbF" id="Hg6EncbtWI" role="3cqZAp">
+                                  <node concept="2OqwBi" id="Hg6EncbtWJ" role="3clFbG">
+                                    <node concept="2YIFZM" id="Hg6EncbtWK" role="2Oq$k0">
+                                      <ref role="1Pybhc" node="7nPD14Nbbbe" resolve="TraceComponent" />
+                                      <ref role="37wK5l" node="7nPD14Nboty" resolve="get" />
+                                      <node concept="2OqwBi" id="Hg6EncbtWL" role="37wK5m">
+                                        <node concept="Xjq3P" id="Hg6EncbtWM" role="2Oq$k0">
+                                          <ref role="1HBi2w" node="1pPth$l_TFV" resolve="TypecheckingHelper" />
+                                        </node>
+                                        <node concept="2OwXpG" id="Hg6EncbtWN" role="2OqNvi">
+                                          <ref role="2Oxat5" node="1pPth$lA2Na" resolve="mpsProject" />
+                                        </node>
+                                      </node>
+                                    </node>
+                                    <node concept="liA8E" id="Hg6EncbtWO" role="2OqNvi">
+                                      <ref role="37wK5l" node="Nob1E3CTMt" resolve="showTool" />
+                                    </node>
+                                  </node>
                                 </node>
                               </node>
-                            </node>
-                          </node>
-                          <node concept="2OqwBi" id="5tpkEj3I$Bt" role="ukAjM">
-                            <node concept="2OqwBi" id="5tpkEj3I$Bu" role="2Oq$k0">
-                              <node concept="Xjq3P" id="5tpkEj3I$Bv" role="2Oq$k0">
-                                <ref role="1HBi2w" node="1pPth$l_TFV" resolve="TypecheckingHelper" />
+                              <node concept="2OqwBi" id="Hg6EncbtWP" role="3clFbw">
+                                <node concept="2OqwBi" id="Hg6EncbtWQ" role="2Oq$k0">
+                                  <node concept="37vLTw" id="Hg6EncbtWR" role="2Oq$k0">
+                                    <ref role="3cqZAo" node="Hg6EncbrFm" resolve="prev" />
+                                  </node>
+                                  <node concept="2OwXpG" id="Hg6EncbtWS" role="2OqNvi">
+                                    <ref role="2Oxat5" node="YgAcJaUSxD" resolve="traceTabs" />
+                                  </node>
+                                </node>
+                                <node concept="3GX2aA" id="Hg6EncbtWT" role="2OqNvi" />
                               </node>
-                              <node concept="2OwXpG" id="5tpkEj3I$Bw" role="2OqNvi">
-                                <ref role="2Oxat5" node="1pPth$lA2Na" resolve="mpsProject" />
-                              </node>
-                            </node>
-                            <node concept="liA8E" id="5tpkEj3I$Bx" role="2OqNvi">
-                              <ref role="37wK5l" to="z1c3:~Project.getRepository():org.jetbrains.mps.openapi.module.SRepository" resolve="getRepository" />
                             </node>
                           </node>
                         </node>
-                        <node concept="3clFbH" id="5tpkEj3IN69" role="3cqZAp" />
+                        <node concept="2OqwBi" id="Hg6EncbtWU" role="ukAjM">
+                          <node concept="2OqwBi" id="Hg6EncbtWV" role="2Oq$k0">
+                            <node concept="Xjq3P" id="Hg6EncbtWW" role="2Oq$k0">
+                              <ref role="1HBi2w" node="1pPth$l_TFV" resolve="TypecheckingHelper" />
+                            </node>
+                            <node concept="2OwXpG" id="Hg6EncbtWX" role="2OqNvi">
+                              <ref role="2Oxat5" node="1pPth$lA2Na" resolve="mpsProject" />
+                            </node>
+                          </node>
+                          <node concept="liA8E" id="Hg6EncbtWY" role="2OqNvi">
+                            <ref role="37wK5l" to="z1c3:~Project.getRepository():org.jetbrains.mps.openapi.module.SRepository" resolve="getRepository" />
+                          </node>
+                        </node>
                       </node>
+                      <node concept="3clFbH" id="Hg6Encbt3C" role="3cqZAp" />
+                      <node concept="3clFbF" id="Hg6Encbtxl" role="3cqZAp">
+                        <node concept="Xjq3P" id="Hg6Encbtxj" role="3clFbG" />
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+                      <node concept="3clFbH" id="Hg6EncbTGQ" role="3cqZAp" />
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-                      <node concept="1rXfSq" id="1N_0WA5KDfO" role="3clFbG">
+              <node concept="liA8E" id="Hg6EncbHNl" role="2OqNvi">
+                <ref role="37wK5l" to="unkn:~Single.map(io.reactivex.functions.Function):io.reactivex.Single" resolve="map" />
+                <node concept="1bVj0M" id="Hg6EncbOgx" role="37wK5m">
+                  <node concept="37vLTG" id="Hg6EncbVoQ" role="1bW2Oz">
+                    <property role="TrG5h" value="highlightingStep" />
+                    <node concept="3uibUv" id="Hg6Encce7l" role="1tU5fm">
+                      <ref role="3uigEE" node="1pPth$lC1vN" resolve="TypecheckingHelper.HighlightingStep" />
+                    </node>
+                  </node>
+                  <node concept="3clFbS" id="Hg6EncbOgy" role="1bW5cS">
+                    <node concept="3clFbH" id="Hg6EncchCU" role="3cqZAp" />
+                    <node concept="3clFbF" id="Hg6EnccpAu" role="3cqZAp">
+                      <node concept="1rXfSq" id="Hg6EnccpAv" role="3clFbG">
                         <ref role="37wK5l" node="7dgRGU4Nmfr" resolve="done" />
-                        <node concept="3clFbT" id="1N_0WA5KDDb" role="37wK5m">
+                        <node concept="3clFbT" id="Hg6EnccpAw" role="37wK5m">
                           <property role="3clFbU" value="true" />
                         </node>
                       </node>
                     </node>
+                    <node concept="3clFbF" id="Hg6Encck9O" role="3cqZAp">
+                      <node concept="37vLTw" id="Hg6Encck9M" role="3clFbG">
+                        <ref role="3cqZAo" node="Hg6EncbVoQ" resolve="highlightingStep" />
+                      </node>
+                    </node>
+                    <node concept="3clFbH" id="Hg6EnccwE2" role="3cqZAp" />
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                 </node>
               </node>
             </node>
           </node>
-          <node concept="3clFbH" id="5tpkEj3Iyg0" role="3cqZAp" />
+          <node concept="3clFbH" id="Hg6EncbmO0" role="3cqZAp" />
+        </node>
+        <node concept="2AHcQZ" id="Hg6EncbkS2" role="2AJF6D">
+          <ref role="2AI5Lk" to="wyt6:~Override" resolve="Override" />
         </node>
       </node>
-      <node concept="2tJIrI" id="52a_GfIPXxQ" role="jymVt" />
+      <node concept="2tJIrI" id="Hg6EncbjnH" role="jymVt" />
       <node concept="312cEg" id="52a_GfIIGna" role="jymVt">
         <property role="TrG5h" value="typeNodes" />
         <property role="3TUv4t" value="false" />
@@ -28973,9 +29366,24 @@
           <node concept="2YIFZM" id="7f1nCjLFveQ" role="3clFbG">
             <ref role="37wK5l" node="3WU9yfAbTWe" resolve="clearAll" />
             <ref role="1Pybhc" node="41ox5VnpFrR" resolve="MarkPlugin" />
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-              <node concept="2WthIp" id="7f1nCjLFveS" role="2Oq$k0" />
-              <node concept="1DTwFV" id="7f1nCjLFveT" role="2OqNvi">
+            <node concept="2OqwBi" id="Hg6End0kfX" role="37wK5m">
+              <node concept="2WthIp" id="Hg6End0kg0" role="2Oq$k0" />
+              <node concept="1DTwFV" id="Hg6End0kg2" role="2OqNvi">
+                <ref role="2WH_rO" node="7f1nCjLFvfT" resolve="mpsProject" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3cpWs8" id="Hg6End0iV8" role="3cqZAp">
+          <node concept="3cpWsn" id="Hg6End0iV9" role="3cpWs9">
+            <property role="TrG5h" value="mp" />
+            <property role="3TUv4t" value="true" />
+            <node concept="3uibUv" id="Hg6End0iV4" role="1tU5fm">
+              <ref role="3uigEE" to="z1c4:~MPSProject" resolve="MPSProject" />
+            </node>
+            <node concept="2OqwBi" id="Hg6End0iVa" role="33vP2m">
+              <node concept="2WthIp" id="Hg6End0iVb" role="2Oq$k0" />
+              <node concept="1DTwFV" id="Hg6End0iVc" role="2OqNvi">
                 <ref role="2WH_rO" node="7f1nCjLFvfT" resolve="mpsProject" />
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@@ -28983,7 +29391,7 @@
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         <node concept="3cpWs8" id="2mbQB8Jl_J$" role="3cqZAp">
           <node concept="3cpWsn" id="2mbQB8Jl_J_" role="3cpWs9">
-            <property role="TrG5h" value="project" />
+            <property role="TrG5h" value="ip" />
             <property role="3TUv4t" value="true" />
             <node concept="3uibUv" id="2mbQB8Jl_Jy" role="1tU5fm">
               <ref role="3uigEE" to="4nm9:~Project" resolve="Project" />
@@ -29032,27 +29440,41 @@
                         <node concept="3cqZAl" id="3F6vMxqbLVZ" role="3clF45" />
                         <node concept="3Tm1VV" id="3F6vMxqbLW0" role="1B3o_S" />
                         <node concept="3clFbS" id="3F6vMxqbLW2" role="3clF47">
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-                            <node concept="2OqwBi" id="7E66$cFdtWf" role="3clFbG">
-                              <node concept="2YIFZM" id="7E66$cFdtWg" role="2Oq$k0">
-                                <ref role="37wK5l" to="jkny:~ToolWindowManager.getInstance(com.intellij.openapi.project.Project):com.intellij.openapi.wm.ToolWindowManager" resolve="getInstance" />
-                                <ref role="1Pybhc" to="jkny:~ToolWindowManager" resolve="ToolWindowManager" />
-                                <node concept="37vLTw" id="2mbQB8JlKL7" role="37wK5m">
-                                  <ref role="3cqZAo" node="2mbQB8Jl_J_" resolve="project" />
+                          <node concept="1QHqEQ" id="Hg6End0l96" role="3cqZAp">
+                            <node concept="1QHqEC" id="Hg6End0l98" role="1QHqEI">
+                              <node concept="3clFbS" id="Hg6End0l9a" role="1bW5cS">
+                                <node concept="3clFbF" id="7E66$cFdtWe" role="3cqZAp">
+                                  <node concept="2OqwBi" id="7E66$cFdtWf" role="3clFbG">
+                                    <node concept="2YIFZM" id="7E66$cFdtWg" role="2Oq$k0">
+                                      <ref role="37wK5l" to="jkny:~ToolWindowManager.getInstance(com.intellij.openapi.project.Project):com.intellij.openapi.wm.ToolWindowManager" resolve="getInstance" />
+                                      <ref role="1Pybhc" to="jkny:~ToolWindowManager" resolve="ToolWindowManager" />
+                                      <node concept="37vLTw" id="2mbQB8JlKL7" role="37wK5m">
+                                        <ref role="3cqZAo" node="2mbQB8Jl_J_" resolve="ip" />
+                                      </node>
+                                    </node>
+                                    <node concept="liA8E" id="7E66$cFdtWk" role="2OqNvi">
+                                      <ref role="37wK5l" to="jkny:~ToolWindowManager.notifyByBalloon(java.lang.String,com.intellij.openapi.ui.MessageType,java.lang.String):void" resolve="notifyByBalloon" />
+                                      <node concept="Xl_RD" id="7E66$cFdtWl" role="37wK5m">
+                                        <property role="Xl_RC" value="Activation Trace" />
+                                      </node>
+                                      <node concept="10M0yZ" id="7E66$cFdtWm" role="37wK5m">
+                                        <ref role="3cqZAo" to="jkm4:~MessageType.INFO" resolve="INFO" />
+                                        <ref role="1PxDUh" to="jkm4:~MessageType" resolve="MessageType" />
+                                      </node>
+                                      <node concept="37vLTw" id="7E66$cFdtWn" role="37wK5m">
+                                        <ref role="3cqZAo" node="3F6vMxqbLVX" resolve="message" />
+                                      </node>
+                                    </node>
+                                  </node>
                                 </node>
                               </node>
-                              <node concept="liA8E" id="7E66$cFdtWk" role="2OqNvi">
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-                                  <property role="Xl_RC" value="Activation Trace" />
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-                                <node concept="10M0yZ" id="7E66$cFdtWm" role="37wK5m">
-                                  <ref role="3cqZAo" to="jkm4:~MessageType.INFO" resolve="INFO" />
-                                  <ref role="1PxDUh" to="jkm4:~MessageType" resolve="MessageType" />
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-                                <node concept="37vLTw" id="7E66$cFdtWn" role="37wK5m">
-                                  <ref role="3cqZAo" node="3F6vMxqbLVX" resolve="message" />
-                                </node>
+                            </node>
+                            <node concept="2OqwBi" id="Hg6End0lSR" role="ukAjM">
+                              <node concept="37vLTw" id="Hg6End0lqT" role="2Oq$k0">
+                                <ref role="3cqZAo" node="Hg6End0iV9" resolve="mp" />
+                              </node>
+                              <node concept="liA8E" id="Hg6End0n2z" role="2OqNvi">
+                                <ref role="37wK5l" to="z1c3:~Project.getRepository():org.jetbrains.mps.openapi.module.SRepository" resolve="getRepository" />
                               </node>
                             </node>
                           </node>
@@ -29068,27 +29490,41 @@
                         <node concept="3cqZAl" id="3F6vMxqbLW7" role="3clF45" />
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                         <node concept="3clFbS" id="3F6vMxqbLWa" role="3clF47">
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-                                  <ref role="3cqZAo" node="2mbQB8Jl_J_" resolve="project" />
+                          <node concept="1QHqEQ" id="Hg6End0o2r" role="3cqZAp">
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+                                <node concept="3clFbF" id="7E66$cFduq$" role="3cqZAp">
+                                  <node concept="2OqwBi" id="7E66$cFduq_" role="3clFbG">
+                                    <node concept="2YIFZM" id="7E66$cFduqA" role="2Oq$k0">
+                                      <ref role="1Pybhc" to="jkny:~ToolWindowManager" resolve="ToolWindowManager" />
+                                      <ref role="37wK5l" to="jkny:~ToolWindowManager.getInstance(com.intellij.openapi.project.Project):com.intellij.openapi.wm.ToolWindowManager" resolve="getInstance" />
+                                      <node concept="37vLTw" id="2mbQB8JlL8Z" role="37wK5m">
+                                        <ref role="3cqZAo" node="2mbQB8Jl_J_" resolve="ip" />
+                                      </node>
+                                    </node>
+                                    <node concept="liA8E" id="7E66$cFduqE" role="2OqNvi">
+                                      <ref role="37wK5l" to="jkny:~ToolWindowManager.notifyByBalloon(java.lang.String,com.intellij.openapi.ui.MessageType,java.lang.String):void" resolve="notifyByBalloon" />
+                                      <node concept="Xl_RD" id="7E66$cFduqF" role="37wK5m">
+                                        <property role="Xl_RC" value="Activation Trace" />
+                                      </node>
+                                      <node concept="10M0yZ" id="7E66$cFduBI" role="37wK5m">
+                                        <ref role="3cqZAo" to="jkm4:~MessageType.ERROR" resolve="ERROR" />
+                                        <ref role="1PxDUh" to="jkm4:~MessageType" resolve="MessageType" />
+                                      </node>
+                                      <node concept="37vLTw" id="7E66$cFduqH" role="37wK5m">
+                                        <ref role="3cqZAo" node="3F6vMxqbLW5" resolve="message" />
+                                      </node>
+                                    </node>
+                                  </node>
                                 </node>
                               </node>
-                              <node concept="liA8E" id="7E66$cFduqE" role="2OqNvi">
-                                <ref role="37wK5l" to="jkny:~ToolWindowManager.notifyByBalloon(java.lang.String,com.intellij.openapi.ui.MessageType,java.lang.String):void" resolve="notifyByBalloon" />
-                                <node concept="Xl_RD" id="7E66$cFduqF" role="37wK5m">
-                                  <property role="Xl_RC" value="Activation Trace" />
-                                </node>
-                                <node concept="10M0yZ" id="7E66$cFduBI" role="37wK5m">
-                                  <ref role="3cqZAo" to="jkm4:~MessageType.ERROR" resolve="ERROR" />
-                                  <ref role="1PxDUh" to="jkm4:~MessageType" resolve="MessageType" />
-                                </node>
-                                <node concept="37vLTw" id="7E66$cFduqH" role="37wK5m">
-                                  <ref role="3cqZAo" node="3F6vMxqbLW5" resolve="message" />
-                                </node>
+                            </node>
+                            <node concept="2OqwBi" id="Hg6End0oMe" role="ukAjM">
+                              <node concept="37vLTw" id="Hg6End0okg" role="2Oq$k0">
+                                <ref role="3cqZAo" node="Hg6End0iV9" resolve="mp" />
+                              </node>
+                              <node concept="liA8E" id="Hg6End0pW4" role="2OqNvi">
+                                <ref role="37wK5l" to="z1c3:~Project.getRepository():org.jetbrains.mps.openapi.module.SRepository" resolve="getRepository" />
                               </node>
                             </node>
                           </node>
@@ -29179,7 +29615,7 @@
               <ref role="3cqZAo" node="7f1nCjLFveW" resolve="helper" />
             </node>
             <node concept="liA8E" id="7f1nCjLFvfS" role="2OqNvi">
-              <ref role="37wK5l" node="1pPth$lNVW2" resolve="execute" />
+              <ref role="37wK5l" node="1pPth$lNVW2" resolve="executeAsync" />
             </node>
           </node>
         </node>
@@ -29386,6 +29822,7 @@
             </node>
           </node>
         </node>
+        <node concept="3clFbH" id="Hg6Enc1E8A" role="3cqZAp" />
         <node concept="3cpWs8" id="7y50OW6XU7B" role="3cqZAp">
           <node concept="3cpWsn" id="7y50OW6XU7C" role="3cpWs9">
             <property role="TrG5h" value="callback" />
@@ -29468,25 +29905,6 @@
             </node>
           </node>
         </node>
-        <node concept="3cpWs8" id="7y50OW6XU8a" role="3cqZAp">
-          <node concept="3cpWsn" id="7y50OW6XU8b" role="3cpWs9">
-            <property role="TrG5h" value="collectRules" />
-            <node concept="3uibUv" id="7y50OW6XU8c" role="1tU5fm">
-              <ref role="3uigEE" node="1pPth$lAzAx" resolve="TypecheckingHelper.Step" />
-            </node>
-            <node concept="2OqwBi" id="7y50OW6XU8d" role="33vP2m">
-              <node concept="37vLTw" id="7y50OW6XU8e" role="2Oq$k0">
-                <ref role="3cqZAo" node="7y50OW6XU82" resolve="helper" />
-              </node>
-              <node concept="liA8E" id="7y50OW6XU8f" role="2OqNvi">
-                <ref role="37wK5l" node="1pPth$lBvOo" resolve="collectRules" />
-                <node concept="37vLTw" id="4n$QnzZUEAj" role="37wK5m">
-                  <ref role="3cqZAo" node="7y50OW6XU7q" resolve="root" />
-                </node>
-              </node>
-            </node>
-          </node>
-        </node>
         <node concept="3cpWs8" id="7y50OW6XU8i" role="3cqZAp">
           <node concept="3cpWsn" id="7y50OW6XU8j" role="3cpWs9">
             <property role="TrG5h" value="runTypechecking" />
@@ -29505,7 +29923,6 @@
             </node>
           </node>
         </node>
-        <node concept="3clFbH" id="7y50OW6XU8r" role="3cqZAp" />
         <node concept="3clFbF" id="7y50OW6XU8s" role="3cqZAp">
           <node concept="2OqwBi" id="7y50OW6XU8t" role="3clFbG">
             <node concept="37vLTw" id="7y50OW6XU8u" role="2Oq$k0">
@@ -29513,8 +29930,16 @@
             </node>
             <node concept="liA8E" id="7y50OW6XU8v" role="2OqNvi">
               <ref role="37wK5l" node="1pPth$lNtBJ" resolve="withSteps" />
-              <node concept="37vLTw" id="7y50OW6XU8w" role="37wK5m">
-                <ref role="3cqZAo" node="7y50OW6XU8b" resolve="collectRules" />
+              <node concept="2OqwBi" id="Hg6EncXkAo" role="37wK5m">
+                <node concept="37vLTw" id="Hg6EncXkAp" role="2Oq$k0">
+                  <ref role="3cqZAo" node="7y50OW6XU82" resolve="helper" />
+                </node>
+                <node concept="liA8E" id="Hg6EncXkAq" role="2OqNvi">
+                  <ref role="37wK5l" node="1pPth$lBvOo" resolve="collectRules" />
+                  <node concept="37vLTw" id="Hg6EncXkAr" role="37wK5m">
+                    <ref role="3cqZAo" node="7y50OW6XU7q" resolve="root" />
+                  </node>
+                </node>
               </node>
               <node concept="37vLTw" id="7y50OW6XU8x" role="37wK5m">
                 <ref role="3cqZAo" node="7y50OW6XU8j" resolve="runTypechecking" />
@@ -29522,17 +29947,193 @@
             </node>
           </node>
         </node>
-        <node concept="3clFbF" id="7y50OW6XU8y" role="3cqZAp">
-          <node concept="2OqwBi" id="7y50OW6XU8z" role="3clFbG">
-            <node concept="37vLTw" id="7y50OW6XU8$" role="2Oq$k0">
-              <ref role="3cqZAo" node="7y50OW6XU82" resolve="helper" />
+        <node concept="3clFbH" id="Hg6Endwa30" role="3cqZAp" />
+        <node concept="3SKdUt" id="Hg6EndAhmX" role="3cqZAp">
+          <node concept="3SKdUq" id="Hg6EndAhmZ" role="3SKWNk">
+            <property role="3SKdUp" value="the magic around &quot;setReadEnabledFlag&quot; is necessary because of the fact " />
+          </node>
+        </node>
+        <node concept="3SKdUt" id="Hg6EndAjnt" role="3cqZAp">
+          <node concept="3SKdUq" id="Hg6EndAjnu" role="3SKWNk">
+            <property role="3SKdUp" value="that tests are launched in WRITE action (see &quot;NodeTestCase&quot; impl)" />
+          </node>
+        </node>
+        <node concept="3SKdUt" id="Hg6EndAj3v" role="3cqZAp">
+          <node concept="3SKdUq" id="Hg6EndAj3x" role="3SKWNk">
+            <property role="3SKdUp" value="thus, in order to trick ModelAccess into believeing read is allowed from the scheduler's thread, " />
+          </node>
+        </node>
+        <node concept="3SKdUt" id="Hg6EndAkH0" role="3cqZAp">
+          <node concept="3SKdUq" id="Hg6EndAkH2" role="3SKWNk">
+            <property role="3SKdUp" value="we set this flag before any read action is requested by type checking" />
+          </node>
+        </node>
+        <node concept="3SKdUt" id="Hg6EndAlND" role="3cqZAp">
+          <node concept="3SKdUq" id="Hg6EndAlNF" role="3SKWNk">
+            <property role="3SKdUp" value="otherwise, the Application's lock would not allow any reads while a write is requested" />
+          </node>
+        </node>
+        <node concept="3cpWs8" id="Hg6Endw4S7" role="3cqZAp">
+          <node concept="3cpWsn" id="Hg6Endw4S8" role="3cpWs9">
+            <property role="TrG5h" value="savedFlag" />
+            <property role="3TUv4t" value="true" />
+            <node concept="10Q1$e" id="Hg6EndyVOk" role="1tU5fm">
+              <node concept="10P_77" id="Hg6Endw4S6" role="10Q1$1" />
             </node>
-            <node concept="liA8E" id="7y50OW6XU8_" role="2OqNvi">
-              <ref role="37wK5l" node="1pPth$lNVW2" resolve="execute" />
+            <node concept="2ShNRf" id="Hg6EndyWLh" role="33vP2m">
+              <node concept="3$_iS1" id="Hg6EndyWDn" role="2ShVmc">
+                <node concept="3$GHV9" id="Hg6EndyWTs" role="3$GQph">
+                  <node concept="3cmrfG" id="Hg6EndyX9B" role="3$I4v7">
+                    <property role="3cmrfH" value="1" />
+                  </node>
+                </node>
+                <node concept="10P_77" id="Hg6EndyWDo" role="3$_nBY" />
+              </node>
             </node>
           </node>
         </node>
-        <node concept="3clFbH" id="7y50OW6XU8A" role="3cqZAp" />
+        <node concept="SfApY" id="Hg6EndBkkK" role="3cqZAp">
+          <node concept="3clFbS" id="Hg6Endw6R6" role="SfCbr">
+            <node concept="3clFbH" id="Hg6EndB3Pr" role="3cqZAp" />
+            <node concept="3clFbF" id="Hg6EndB5PB" role="3cqZAp">
+              <node concept="2OqwBi" id="Hg6EndBev0" role="3clFbG">
+                <node concept="2OqwBi" id="Hg6EndBgeI" role="2Oq$k0">
+                  <node concept="2OqwBi" id="Hg6EndB7s3" role="2Oq$k0">
+                    <node concept="2OqwBi" id="Hg6EndBZIL" role="2Oq$k0">
+                      <node concept="2OqwBi" id="Hg6EndB63M" role="2Oq$k0">
+                        <node concept="2YIFZM" id="Hg6EndB5PD" role="2Oq$k0">
+                          <ref role="37wK5l" to="unkn:~Completable.complete():io.reactivex.Completable" resolve="complete" />
+                          <ref role="1Pybhc" to="unkn:~Completable" resolve="Completable" />
+                        </node>
+                        <node concept="liA8E" id="Hg6EndB6q6" role="2OqNvi">
+                          <ref role="37wK5l" to="unkn:~Completable.startWith(io.reactivex.CompletableSource):io.reactivex.Completable" resolve="startWith" />
+                          <node concept="2YIFZM" id="Hg6EndB6Lu" role="37wK5m">
+                            <ref role="37wK5l" to="unkn:~Completable.fromRunnable(java.lang.Runnable):io.reactivex.Completable" resolve="fromRunnable" />
+                            <ref role="1Pybhc" to="unkn:~Completable" resolve="Completable" />
+                            <node concept="1bVj0M" id="Hg6EndB75V" role="37wK5m">
+                              <node concept="3clFbS" id="Hg6EndB75W" role="1bW5cS">
+                                <node concept="3clFbH" id="Hg6EndB79W" role="3cqZAp" />
+                                <node concept="3clFbF" id="Hg6EndB7dZ" role="3cqZAp">
+                                  <node concept="37vLTI" id="Hg6EndB7e0" role="3clFbG">
+                                    <node concept="2OqwBi" id="Hg6EndB7e1" role="37vLTx">
+                                      <node concept="2YIFZM" id="Hg6EndB7e2" role="2Oq$k0">
+                                        <ref role="1Pybhc" to="w1kc:~ModelAccess" resolve="ModelAccess" />
+                                        <ref role="37wK5l" to="w1kc:~ModelAccess.instance():jetbrains.mps.smodel.ModelAccess" resolve="instance" />
+                                      </node>
+                                      <node concept="liA8E" id="Hg6EndB7e3" role="2OqNvi">
+                                        <ref role="37wK5l" to="w1kc:~ModelAccess.setReadEnabledFlag(boolean):boolean" resolve="setReadEnabledFlag" />
+                                        <node concept="3clFbT" id="Hg6EndB7e4" role="37wK5m">
+                                          <property role="3clFbU" value="true" />
+                                        </node>
+                                      </node>
+                                    </node>
+                                    <node concept="AH0OO" id="Hg6EndB7e5" role="37vLTJ">
+                                      <node concept="3cmrfG" id="Hg6EndB7e6" role="AHEQo">
+                                        <property role="3cmrfH" value="0" />
+                                      </node>
+                                      <node concept="37vLTw" id="Hg6EndB7e7" role="AHHXb">
+                                        <ref role="3cqZAo" node="Hg6Endw4S8" resolve="savedFlag" />
+                                      </node>
+                                    </node>
+                                  </node>
+                                </node>
+                                <node concept="3clFbH" id="Hg6EndB79Y" role="3cqZAp" />
+                              </node>
+                            </node>
+                          </node>
+                        </node>
+                      </node>
+                      <node concept="liA8E" id="Hg6EndC0e_" role="2OqNvi">
+                        <ref role="37wK5l" to="unkn:~Completable.subscribeOn(io.reactivex.Scheduler):io.reactivex.Completable" resolve="subscribeOn" />
+                        <node concept="2YIFZM" id="Hg6EndC1AE" role="37wK5m">
+                          <ref role="37wK5l" to="m4y7:~Schedulers.single():io.reactivex.Scheduler" resolve="single" />
+                          <ref role="1Pybhc" to="m4y7:~Schedulers" resolve="Schedulers" />
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="liA8E" id="Hg6EndB85r" role="2OqNvi">
+                      <ref role="37wK5l" to="unkn:~Completable.andThen(io.reactivex.CompletableSource):io.reactivex.Completable" resolve="andThen" />
+                      <node concept="2OqwBi" id="Hg6EndBe2z" role="37wK5m">
+                        <node concept="37vLTw" id="Hg6EndBe2$" role="2Oq$k0">
+                          <ref role="3cqZAo" node="7y50OW6XU82" resolve="helper" />
+                        </node>
+                        <node concept="liA8E" id="Hg6EndBe2_" role="2OqNvi">
+                          <ref role="37wK5l" node="2mbQB8J5m$l" resolve="scheduleExecute" />
+                          <node concept="2YIFZM" id="Hg6EndDbMD" role="37wK5m">
+                            <ref role="1Pybhc" to="m4y7:~Schedulers" resolve="Schedulers" />
+                            <ref role="37wK5l" to="m4y7:~Schedulers.single():io.reactivex.Scheduler" resolve="single" />
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                  </node>
+                  <node concept="liA8E" id="Hg6EndBhdo" role="2OqNvi">
+                    <ref role="37wK5l" to="unkn:~Completable.doFinally(io.reactivex.functions.Action):io.reactivex.Completable" resolve="doFinally" />
+                    <node concept="1bVj0M" id="Hg6EndBhKR" role="37wK5m">
+                      <node concept="3clFbS" id="Hg6EndBhKS" role="1bW5cS">
+                        <node concept="3clFbH" id="Hg6EndBi4V" role="3cqZAp" />
+                        <node concept="3clFbF" id="Hg6EndBidM" role="3cqZAp">
+                          <node concept="2OqwBi" id="Hg6EndBidN" role="3clFbG">
+                            <node concept="2YIFZM" id="Hg6EndBidO" role="2Oq$k0">
+                              <ref role="1Pybhc" to="w1kc:~ModelAccess" resolve="ModelAccess" />
+                              <ref role="37wK5l" to="w1kc:~ModelAccess.instance():jetbrains.mps.smodel.ModelAccess" resolve="instance" />
+                            </node>
+                            <node concept="liA8E" id="Hg6EndBidP" role="2OqNvi">
+                              <ref role="37wK5l" to="w1kc:~ModelAccess.setReadEnabledFlag(boolean):boolean" resolve="setReadEnabledFlag" />
+                              <node concept="AH0OO" id="Hg6EndBidQ" role="37wK5m">
+                                <node concept="3cmrfG" id="Hg6EndBidR" role="AHEQo">
+                                  <property role="3cmrfH" value="0" />
+                                </node>
+                                <node concept="37vLTw" id="Hg6EndBidS" role="AHHXb">
+                                  <ref role="3cqZAo" node="Hg6Endw4S8" resolve="savedFlag" />
+                                </node>
+                              </node>
+                            </node>
+                          </node>
+                        </node>
+                        <node concept="3clFbH" id="Hg6EndBi7v" role="3cqZAp" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+                <node concept="liA8E" id="Hg6EndBfCU" role="2OqNvi">
+                  <ref role="37wK5l" to="unkn:~Completable.blockingAwait():void" resolve="blockingAwait" />
+                </node>
+              </node>
+            </node>
+            <node concept="3clFbH" id="Hg6Endwf5W" role="3cqZAp" />
+          </node>
+          <node concept="TDmWw" id="Hg6EndAeLa" role="TEbGg">
+            <node concept="3cpWsn" id="Hg6EndAeLb" role="TDEfY">
+              <property role="TrG5h" value="exception" />
+              <node concept="3uibUv" id="Hg6EndAfh$" role="1tU5fm">
+                <ref role="3uigEE" to="wyt6:~Exception" resolve="Exception" />
+              </node>
+            </node>
+            <node concept="3clFbS" id="Hg6EndAeLd" role="TDEfX">
+              <node concept="3SKdUt" id="Hg6EndB0SS" role="3cqZAp">
+                <node concept="3SKdUq" id="Hg6EndB0SU" role="3SKWNk">
+                  <property role="3SKdUp" value="FIXME: should probably report this exception to the caller (change checkTypes' contract)" />
+                </node>
+              </node>
+              <node concept="34ab3g" id="Hg6EndAfF$" role="3cqZAp">
+                <property role="35gtTG" value="warn" />
+                <property role="34fQS0" value="true" />
+                <node concept="Xl_RD" id="Hg6EndAfFA" role="34bqiv">
+                  <property role="Xl_RC" value="Exception while typechecking" />
+                </node>
+                <node concept="37vLTw" id="Hg6EndAfFC" role="34bMjA">
+                  <ref role="3cqZAo" node="Hg6EndAeLb" resolve="exception" />
+                </node>
+                <node concept="37vLTw" id="Hg6EndAgh8" role="RQzLk">
+                  <ref role="3cqZAo" node="7y50OW6XU7s" resolve="prj" />
+                </node>
+              </node>
+              <node concept="3clFbH" id="Hg6EndAfnW" role="3cqZAp" />
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbH" id="Hg6Endvgnu" role="3cqZAp" />
         <node concept="3clFbF" id="7y50OW6Yrqq" role="3cqZAp">
           <node concept="2ShNRf" id="7y50OW6Yrqm" role="3clFbG">
             <node concept="YeOm9" id="7y50OW6Ytrt" role="2ShVmc">
@@ -30477,7 +31078,7 @@
               <ref role="3cqZAo" node="3YJ7yg2LFpL" resolve="helper" />
             </node>
             <node concept="liA8E" id="3YJ7yg2LTT$" role="2OqNvi">
-              <ref role="37wK5l" node="1pPth$lNVW2" resolve="execute" />
+              <ref role="37wK5l" node="1pPth$lNVW2" resolve="executeAsync" />
             </node>
           </node>
         </node>