Clears the undo and redo stacks of all operations involving the specified target as the recipient of the undo message.
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The recipient of the undo messages to be removed.
Doesn’t re-enable the receiver if it’s disabled.
Clears the undo and redo stacks and re-enables the receiver.
Enables the recording of undo operations.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.