IPreferenceStore store= JavaPlugin.getDefault().getPreferenceStore(); store.removePropertyChangeListener(fPropertyChangeListener); fPropertyChangeListener= null;
		public void partClosed(IWorkbenchPart part) {			if (part == fEditor) {				fEditor.getSite().getWorkbenchWindow().getPartService().removePartListener(fPartListener);				fPartListener= null;			}		}