Bug 51647 [navigation] Quick Outline: Toggle inherited method does not reveal selection
20040211 - Open java.lang.reflect.Field and press CTRL+O on 'getShort'. - Press CTRL+O again see attached screenshot: -> getShort not revealed anymore, tree scrolled horizontally
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaOutlineInformationControl.java
private IProgressMonitor getProgressMonitor() {
			IWorkbenchPage wbPage= JavaPlugin.getActivePage();
			if (wbPage == null)
				return null;
			
			IEditorPart editor= wbPage.getActiveEditor();
			if (editor == null)
				return null;
			
			return editor.getEditorSite().getActionBars().getStatusLineManager().getProgressMonitor();			
		}
		
		/**
		 * {@inheritDoc}
		 */
		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
			super.inputChanged(viewer, oldInput, newInput);
			fTypeHierarchies.clear();
		}
		
		/**
		 * {@inheritDoc}
		 */
		public void dispose() {
			super.dispose();
			fTypeHierarchies.clear();
		}
	}
	/**
	 * Creates a new Java outline information control.