The NSResponder class doesn't have the cancelOperation method. Perhaps this is by necessity, not sure.
The issue is that many of those methods are there as features that are not implemented directly by NSResponder but that might be implemented by some subclass, from the header file:
This category contains a large number of methods intended for use as key binding commands.
NSResponder does not implement any of them. NSTextView implements a certain subset of them (see the NSTextView.h header). Your responder subclasses can implement any that make sense. You can make up your own as well, but you should use these if the concepts map. If your view is key and uses key binding and the user types a key sequence which is bound to a command which is not implemented in your class, it is OK, nothing will happen by default.
I have not decided yet what is the right approach to bind these.