def find_message_handler(self, handler_name, handler_type='<STR_LIT>'):
ret = lib.EnvFindDefmessageHandler(<EOL>self._env, self._cls, handler_name.encode(), handler_type.encode())<EOL>if ret == <NUM_LIT:0>:<EOL><INDENT>raise CLIPSError(self._env)<EOL><DEDENT>return MessageHandler(self._env, self._cls, ret)<EOL>
Returns the MessageHandler given its name and type for this class.