human
I wrote the below code

    def ClearExtension(self, extension_handle):
        _VerifyExtensionHandle(self, extension_handle)
        if (extension_handle in self._fields):
            del self._fields[extension_handle]
        self._Modified()
    cls.ClearExtension = ClearExtension

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def _AddClearExtensionMethod(cls):