removeListeners();
	private void workspaceChanged() {		if (fUndoManagerListener != null && fUndoManagerListener.isPerformingChange())			return;		fValidationState= RefactoringStatus.createFatalErrorStatus(RefactoringCoreMessages.getString("DynamicValidationStateChange.workspace_changed")); //$NON-NLS-1$		RefactoringCore.getUndoManager().flush();		removeListeners();	}