IPreferenceStore store= getPreferenceStore();
IPreferenceStore store= getNewPreferenceStore();
	protected boolean isPrefQuickDiffAlwaysOn() {		// reestablishes the behaviour from ExtendedTextEditor which was hacked by JavaEditor		// to disable the change bar for the class file (attached source) java editor.		IPreferenceStore store= getPreferenceStore();		return store.getBoolean(ExtendedTextEditorPreferenceConstants.QUICK_DIFF_ALWAYS_ON);	}