Merge pull request #489 from IETS3/bugfix/fixDoubleMessages

Omit double UI-Messages in buffer for async error highlightning

Author: dbinkele

code/languages/org.iets3.opensource/languages/org.iets3.analysis.base/models/behavior.mps

@@ -689,6 +689,9 @@
                 <ref role="37wK5l" to="dzyv:~ChronoUnit.getDuration()" resolve="getDuration" />
               </node>
             </node>
+            <node concept="3clFbT" id="cwnBfE0FNP" role="37wK5m">
+              <property role="3clFbU" value="true" />
+            </node>
           </node>
         </node>
       </node>
@@ -1388,6 +1391,9 @@
                 <ref role="37wK5l" to="dzyv:~ChronoUnit.getDuration()" resolve="getDuration" />
               </node>
             </node>
+            <node concept="3clFbT" id="cwnBfE0G29" role="37wK5m">
+              <property role="3clFbU" value="true" />
+            </node>
           </node>
         </node>
       </node>