diff --git a/samples/mpscore/languages/jetbrains.mps.baseLanguage.collectionsExt/models/jetbrains.mps.baseLanguage.collectionsExt.types.mps b/samples/mpscore/languages/jetbrains.mps.baseLanguage.collectionsExt/models/jetbrains.mps.baseLanguage.collectionsExt.types.mps
index dd92eeae..077149d0 100644
--- a/samples/mpscore/languages/jetbrains.mps.baseLanguage.collectionsExt/models/jetbrains.mps.baseLanguage.collectionsExt.types.mps
+++ b/samples/mpscore/languages/jetbrains.mps.baseLanguage.collectionsExt/models/jetbrains.mps.baseLanguage.collectionsExt.types.mps
@@ -3,10 +3,426 @@
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diff --git a/samples/mpscore/solutions/jetbrains.mps.baseLanguage.collectionsExt.test/models/jetbrains.mps.baseLanguage.collectionsExt.test.sequence.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguage.collectionsExt.test/models/jetbrains.mps.baseLanguage.collectionsExt.test.sequence.mps
index ae53fe80..ac35efbc 100644
--- a/samples/mpscore/solutions/jetbrains.mps.baseLanguage.collectionsExt.test/models/jetbrains.mps.baseLanguage.collectionsExt.test.sequence.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguage.collectionsExt.test/models/jetbrains.mps.baseLanguage.collectionsExt.test.sequence.mps
@@ -233,6 +233,9 @@
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