Bug 31865 Package Explorer: Cannot search for references in workspace
Build 20030213 1. Create class X with method foo 2. In Package Explorer, select foo 3. Right click, select References in the pop up menu Observe: The sub-menu contains only working sets. The other entries (Workspace, Hierarchy, Working Set...) have disappeared.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/viewsupport/ProblemTableViewer.java
* @param parent
	 */
	public ProblemTableViewer(Composite parent) {
		super(parent);
		initMapper();
	}
	/**
	 * Constructor for ProblemTableViewer.
	 * @param parent
	 * @param style
	 */
	public ProblemTableViewer(Composite parent, int style) {
		super(parent, style);
		initMapper();
	}
	/**
	 * Constructor for ProblemTableViewer.
	 * @param table
	 */
	public ProblemTableViewer(Table table) {
		super(table);
		initMapper();
	}
	private void initMapper() {
		fResourceToItemsMapper= new ResourceToItemsMapper(this);
	}
	
	/*
	 * @see StructuredViewer#mapElement(Object, Widget)
	 */