Bug 99886 [package explorer] Package Explorer focus is not synchronized with the active editor part
During startup Package Explorer tree is closed regardless of the editor currently opened.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
* {@inheritDoc}
		 */
		protected Object[] addAditionalProblemParents(Object[] elements) {
			if (showWorkingSets()) {
				return fWorkingSetModel.addWorkingSets(elements);
			}
			return elements;
		}
		
		
		
		protected Object[] getSortedChildren(Object parent) {
			IParentAwareSorter sorter= getSorter() instanceof IParentAwareSorter 
				? (IParentAwareSorter)getSorter()
				: null;
			if (sorter != null)
				sorter.setParent(parent);
			try {
				return super.getSortedChildren(parent);
			} finally {
				if (sorter != null)
					sorter.setParent(null);
			}
		}
		
		
		
		
		
		Map fAdditionalMappings= new HashMap();