Bug 161738 [Undo] - API - promote ability to quietly compute status to operations API
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/AbstractWorkspaceOperation.java
}
	/*
	 * (non-Javadoc)
	 * 
	 * This implementation checks a validity flag.
	 * 
	 * @see org.eclipse.core.commands.operations.IUndoableOperation#canExecute()
	 */
	public boolean canExecute() {
		return isValid();
	}
	/*
	 * (non-Javadoc)
	 * 
	 * This implementation checks a validity flag.
	 * 
	 * @see org.eclipse.core.commands.operations.IUndoableOperation#canUndo()
	 */
	public boolean canUndo() {
		return isValid();
	}
	/*
	 * (non-Javadoc)
	 * 
	 * This implementation checks a validity flag.
	 * 
	 * @see org.eclipse.core.commands.operations.IUndoableOperation#canRedo()
	 */
	public boolean canRedo() {
		return isValid();