From e4a23ee50fca6ef4cda0729d86fc826e57e8b781 Mon Sep 17 00:00:00 2001
From: Fedor Isakov <fisakov@gmail.com>
Date: Thu, 20 Aug 2020 14:20:32 +0200
Subject: [PATCH] Keep "types" model from deletion with a placeholder.

---
 ...ains.mps.baseLanguage.blTypesExt.types.mps | 20 ++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/samples/mpscore/languages/jetbrains.mps.baseLanguage.blTypesExt/models/jetbrains.mps.baseLanguage.blTypesExt.types.mps b/samples/mpscore/languages/jetbrains.mps.baseLanguage.blTypesExt/models/jetbrains.mps.baseLanguage.blTypesExt.types.mps
index 3bf17262..a9799cce 100644
--- a/samples/mpscore/languages/jetbrains.mps.baseLanguage.blTypesExt/models/jetbrains.mps.baseLanguage.blTypesExt.types.mps
+++ b/samples/mpscore/languages/jetbrains.mps.baseLanguage.blTypesExt/models/jetbrains.mps.baseLanguage.blTypesExt.types.mps
@@ -3,9 +3,27 @@
   <persistence version="9" />
   <languages>
     <use id="4b5b4f8d-d30a-4ef8-9bf4-dfd26af9d462" name="jetbrains.mps.lang.typechecking" version="0" />
+    <engage id="4b5b4f8d-d30a-4ef8-9bf4-dfd26af9d462" name="jetbrains.mps.lang.typechecking" />
     <devkit ref="fbc25dd2-5da4-483a-8b19-70928e1b62d7(jetbrains.mps.devkit.general-purpose)" />
   </languages>
   <imports />
-  <registry />
+  <registry>
+    <language id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage">
+      <concept id="1465982738277781862" name="jetbrains.mps.baseLanguage.structure.PlaceholderMember" flags="ng" index="2tJIrI" />
+      <concept id="1068390468198" name="jetbrains.mps.baseLanguage.structure.ClassConcept" flags="ig" index="312cEu" />
+      <concept id="1107461130800" name="jetbrains.mps.baseLanguage.structure.Classifier" flags="ng" index="3pOWGL">
+        <child id="5375687026011219971" name="member" index="jymVt" unordered="true" />
+      </concept>
+    </language>
+    <language id="ceab5195-25ea-4f22-9b92-103b95ca8c0c" name="jetbrains.mps.lang.core">
+      <concept id="1169194658468" name="jetbrains.mps.lang.core.structure.INamedConcept" flags="ng" index="TrEIO">
+        <property id="1169194664001" name="name" index="TrG5h" />
+      </concept>
+    </language>
+  </registry>
+  <node concept="312cEu" id="465oGMjzV5y">
+    <property role="TrG5h" value="placeholder" />
+    <node concept="2tJIrI" id="465oGMjzV5S" role="jymVt" />
+  </node>
 </model>