JavaPluginImages.setImageDescriptors(this, "lcl16", "backward.gif");
JavaPluginImages.setImageDescriptors(this, "lcl16", "backward_nav.gif");
	public HistoryAction(TypeHierarchyViewPart viewPart, boolean forward) {		super(getLabel(forward));		setDescription(getDescription(forward));		if (forward) {			JavaPluginImages.setImageDescriptors(this, "lcl16", "forward_nav.gif"); //$NON-NLS-1$ //$NON-NLS-2$		} else {			JavaPluginImages.setImageDescriptors(this, "lcl16", "backward.gif"); //$NON-NLS-1$ //$NON-NLS-2$		}				fViewPart= viewPart;		fIsForward= forward;		update();	}