Bug 61878 Package explorer is filtering out plugin dependencies [package explorer]
Build 20040506 When expanding the Plug-in Dependencies container, it is counter-intuitive to hide project dependencies. These are shown in the build path wizard itself, when you expand this container. I would expect to see them all the time.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerContentProvider.java
fPackageFragmentProvider.inputChanged(viewer, oldInput, newInput);
		fViewer= (TreeViewer)viewer;
		if (oldInput == null && newInput != null) {
			JavaCore.addElementChangedListener(this); 
		} else if (oldInput != null && newInput == null) {
			JavaCore.removeElementChangedListener(this); 
		}
		fInput= newInput;
	}
	
	/**
	 * Processes a delta recursively. When more than two children are affected the
	 * tree is fully refreshed starting at this node. The delta is processed in the
	 * current thread but the viewer updates are posted to the UI thread.
	 */
	private void processDelta(IJavaElementDelta delta) throws JavaModelException {
		int kind= delta.getKind();
		int flags= delta.getFlags();
		IJavaElement element= delta.getElement();
		int elementType= element.getElementType();
		
		
		if (elementType != IJavaElement.JAVA_MODEL && elementType != IJavaElement.JAVA_PROJECT) {
			IJavaProject proj= element.getJavaProject();
			if (proj == null || !proj.getProject().isOpen()) 
				return;	
		}
		
		if (!fIsFlatLayout && elementType == IJavaElement.PACKAGE_FRAGMENT) {
			fPackageFragmentProvider.processDelta(delta);