Bug 93400 LTK UI should provide official API for structural content in the preview page
org.eclipse.ltk.ui.refactoring/src/org/eclipse/ltk/internal/ui/refactoring/ChangeElementLabelProvider.java
private Map fDescriptorImageMap= new HashMap();
	private boolean fShowQualification= true;
	public ChangeElementLabelProvider() {
	}
		
	public void setShowQualification(boolean showQualification) {
		fShowQualification= showQualification;
		LabelProviderChangedEvent event= new LabelProviderChangedEvent(this, null);
		fireLabelProviderChanged(event);
	}
	
	public Image getImage(Object object) {
		if (object instanceof DefaultChangeElement) {