Bug 137148 [Markers] Contributions to IMarker no longer show up on elements in the Problems View
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/TableView.java
private MarkerTreeContentProvider contentProvider;
	/*
	 * (non-Javadoc) Method declared on IViewPart.
	 */
	public void init(IViewSite site, IMemento memento) throws PartInitException {
		super.init(site, memento);
		this.memento = memento;
	}
	/**
	 * 
	 */
	
	
	
	
	
	
	
	
	
	abstract protected void viewerSelectionChanged(
			IStructuredSelection selection);
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.part.WorkbenchPart#createPartControl(org.eclipse.swt.widgets.Composite)
	 */
	public void createPartControl(Composite parent) {
		parent.setLayout(new FillLayout());
		viewer = new TreeViewer(createTree(parent));