+void Model_Data::removeBackReference(FeaturePtr theFeature, std::string theAttrID)
+{
+ AttributePtr anAttribute = theFeature->data()->attribute(theAttrID);
+ if (myRefsToMe.find(anAttribute) == myRefsToMe.end())
+ return;
+
+ myRefsToMe.erase(anAttribute);
+}
+
+void Model_Data::addBackReference(FeaturePtr theFeature, std::string theAttrID,
+ const bool theApplyConcealment)