code: func ChangeContactSvcNotificationTimeperiod(
  	contact_name string,
  	notification_timeperiod string,
  ) *livestatus.Command {
  	return livestatus.NewCommand(
  		"CHANGE_CONTACT_SVC_NOTIFICATION_TIMEPERIOD",
  		stringifyArg("contact_name", "string", contact_name),
  		stringifyArg("notification_timeperiod", "string", notification_timeperiod),
  	)
  }
docs: // ChangeContactSvcNotificationTimeperiod creates a new "CHANGE_CONTACT_SVC_NOTIFICATION_TIMEPERIOD" Nagios command.
  //
  // Changes the service notification timeperiod for a particular contact to what is specified by the
  // "notification_timeperiod" option.
  //
  // The "notification_timeperiod" option should be the short name of the timeperiod that is to be used as the contact's
  // service notification timeperiod.
  //
  // The timeperiod must have been configured in Nagios before it was last (re)started.