diff --git a/samples/mpscore/languages/jetbrains.mps.baseLanguageExt/models/jetbrains.mps.baseLanguageExt.types.mps b/samples/mpscore/languages/jetbrains.mps.baseLanguageExt/models/jetbrains.mps.baseLanguageExt.types.mps
index a81e16f0..2da4bd9b 100644
--- a/samples/mpscore/languages/jetbrains.mps.baseLanguageExt/models/jetbrains.mps.baseLanguageExt.types.mps
+++ b/samples/mpscore/languages/jetbrains.mps.baseLanguageExt/models/jetbrains.mps.baseLanguageExt.types.mps
@@ -41209,6 +41209,14 @@
                       <node concept="a7P8L" id="tbauFybkiW" role="3jbY8V">
                         <ref role="a7OzE" node="tbauFybkiD" resolve="B" />
                       </node>
+                      <node concept="3jhG_Y" id="61G6TdEgNS3" role="3jhGvd">
+                        <node concept="3jhG_Z" id="61G6TdEgNSl" role="3jhGob">
+                          <ref role="3jhG_U" node="5itBwMb2a1b" resolve="allowUncheckedConversion" />
+                          <node concept="3clFbT" id="61G6TdEgNSp" role="3jhG_S">
+                            <property role="3clFbU" value="true" />
+                          </node>
+                        </node>
+                      </node>
                     </node>
                   </node>
                 </node>