ST6RI-178 Overrode hasCode for LocalReference class

Author: TheKorpos

org.omg.sysml/src/org/omg/sysml/util/repository/APIModel.java

@@ -32,6 +32,7 @@
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import org.omg.sysml.StringUtil;
 import org.omg.sysml.lang.sysml.OwningMembership;
 import org.omg.sysml.model.Element;
 
@@ -239,6 +240,11 @@ public boolean equals(Object o) {
 			return o == this || (o instanceof Map m && m.containsKey(ProjectRepository.ID_FIELD) && idEquals(m));
 		}
 
+		@Override
+		public int hashCode() {
+			return this.containsKey(ProjectRepository.ID_FIELD)? this.get(ProjectRepository.ID_FIELD).hashCode(): super.hashCode();
+		}
+		
 		private boolean idEquals(Map<?,?> other) {
 			UUID id = this.get(ProjectRepository.ID_FIELD);
 			Object otherid = other.get(ProjectRepository.ID_FIELD);