'Get a getmore message.'

def get_message(self, dummy0, dummy1, use_cmd=False):

    ns = (_UJOIN % (self.db, self.coll))
    if use_cmd:
        ns = (_UJOIN % (self.db, '$cmd'))
        spec = self.as_command()[0]
        return query(0, ns, 0, (-1), spec, None, self.codec_options)
    return get_more(ns, self.ntoreturn, self.cursor_id)
