Bug 275910 [Widgets] PaintListener on Tree not invoked when item count is 0
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
/**
	 * The Markers View Update Job Family
	 * @since 3.6
	 */
	public final Object MARKERSVIEW_UPDATE_JOB_FAMILY = new Object();
	static final String MARKER_FIELD = "MARKER_FIELD";