- beginUndoGrouping
- canRedo
- canUndo
- disableUndoRegistration
- endUndoGrouping
- forgetAll
- forgetAllWithTarget:
- forwardInvocation:
- groupsByEvent
- isRedoing
- isUndoing
- levelsOfUndo
- prepareWithInvocationTarget:
- redo
- reenableUndoRegistration
- registerUndoWithTarget:selector:arg:
- setGroupsByEvent:
- setLevelsOfUndo:
- undo
- undoNestedGroup