fStore.addKeys(createOverlayStoreKeys());
	public QuickdiffConfigurationBlock(IPreferenceStore store, String prefix) {		Assert.isNotNull(store);		fStore= store;		MarkerAnnotationPreferences markerAnnotationPreferences= new MarkerAnnotationPreferences();		fQuickDiffModel= createQuickDiffModel(markerAnnotationPreferences);		fQuickDiffProviderListModel= createQuickDiffReferenceListModel();	}