Bug 114542 [Markers] Possible to get empty path nodes in problems view hierarcahl mode
20051101 Warnings on the top level of a project ended up having an empty label. STEPS 1) Change filters to show selected elements and children 2) Go into hierarchal mode 3) Select org.eclipse.ui.tests
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
* 
	 * @return <code>true</code> if hierarchal mode is being shown
	 */
	public boolean isHierarchalMode() {
		return false;
	}
	/**
	 * Return the TableSorter
	 * 
	 * @return TableSorter
	 */
	public TableSorter getTableSorter() {
		return (TableSorter) getViewer().getSorter();
	}
	/**
	 * Add a listener for the end of the update.
	 * @param listener
	 */
	public void addUpdateFinishListener(IJobChangeListener listener) {
		updateJob.addJobChangeListener(listener);
	}
	/**
	 * Remove a listener for the end of the update.
	 * @param listener
	 */
	public void removeUpdateFinishListener(IJobChangeListener listener) {
		updateJob.removeJobChangeListener(listener);
	}
}