*[`Ntp::Key_id`](#ntpkey_id):Seehttp://doc.ntp.org/4.2.6/authopt.html#controlkey for documentation Alternatively: type Ntp::Key_id = Variant[Integer, Pattern['']]
*[`Ntp::Poll_interval`](#ntppoll_interval):Seehttp://doc.ntp.org/4.2.6/clockopt.html#server for documentation Alternatively: type Ntp::Poll_interval = Variant[Integer, Pattern['']]