setEnabled(actionGroup.getWorkingSet() != null);
	public EditWorkingSetAction(WorkingSetFilterActionGroup actionGroup, Shell shell) {		super(WorkingSetMessages.getString("EditWorkingSetAction.text")); //$NON-NLS-1$		Assert.isNotNull(actionGroup);		setToolTipText(WorkingSetMessages.getString("EditWorkingSetAction.toolTip")); //$NON-NLS-1$				fShell= shell;		fActionGroup= actionGroup;		WorkbenchHelp.setHelp(this, IJavaHelpContextIds.EDIT_WORKING_SET_ACTION);	}