def add_group_grant(self, permission, group_id):
        acl = self.get_acl()
        acl.add_group_grant(permission, group_id)
        self.set_acl(acl)
Takes a statement string and a list of statement strings.
dataset/ETHPy150Open yyuu/botornado/boto/gs/key.py/Key.add_group_grant--crossover with--dataset/ETHPy150Open gunthercox/ChatterBot/chatterbot/adapters/logic/closest_match.py/ClosestMatchAdapter.get