Revert "Experiments with ignoring duplicate removeAdapter events #26"

This reverts commit 1d9b398 because the
Base index internals cannot be overridden appropriately.

com.incquerylabs.v4md/src/main/com/incquerylabs/v4md/internal/MagicDrawProjectNavigationHelper.java

@@ -14,8 +14,8 @@
 import org.eclipse.viatra.query.runtime.base.api.BaseIndexOptions;
 import org.eclipse.viatra.query.runtime.base.api.filters.IBaseIndexObjectFilter;
 import org.eclipse.viatra.query.runtime.base.api.filters.IBaseIndexResourceFilter;
+import org.eclipse.viatra.query.runtime.base.core.NavigationHelperContentAdapter;
 import org.eclipse.viatra.query.runtime.base.core.NavigationHelperImpl;
-import org.eclipse.viatra.query.runtime.base.core.V4MDNavigationHelperContentAdapter;
 import org.eclipse.viatra.query.runtime.base.exception.ViatraBaseException;
 
 import com.nomagic.uml2.ext.jmi.EventSupport;
@@ -53,7 +53,20 @@ public void error(Object message) {
 	public MagicDrawProjectNavigationHelper(Notifier emfRoot, BaseIndexOptions options, EventSupport eventSupport, Logger logger) {
 		super(emfRoot, options, new WrappedLogger(logger));
 		this.logger = logger;
-		this.contentAdapter = new V4MDNavigationHelperContentAdapter(this);
+		// TODO While this change helps avoiding some duplicate notifications, it causes
+		// a regression when adding a new project usage to a local project: when the
+		// usage is added, event firing is turned off, resulting in the added profile
+		// not available in the index of the project
+//		this.contentAdapter = new NavigationHelperContentAdapter(this) {
+//			
+//			@Override
+//			public void notifyChanged(Notification notification) {
+//				if (eventSupport.isEnableEventFiring()) {
+//					super.notifyChanged(notification);
+//				}
+//			}
+//			
+//		};
 	}
 
 	Set<Notifier> getModelRoots() {