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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def decode_hook(self, hook):
 """ Decodes a protobuf commit hook message into a dict. Used in bucket properties. :param hook: the hook to decode :type hook: riak.pb.riak_pb2.RpbCommitHook :rtype dict """

        if hook.HasField('modfun'):
            return self.decode_modfun(hook.modfun)
        else:
            return {'name': bytes_to_str(hook.name)}