def _ntp_servers(self, ip_type):
        self.is_option = True
        self.is_statement = False
        self.has_validator = True
        self._ip_list(ip_type)
option ntp-servers ip-address [, ip-address... ];
dataset/ETHPy150Open rtucker-mozilla/mozilla_inventory/core/keyvalue/base_option.py/CommonOption._ntp_servers