619.5  Withdrawal of motion or demurrer.
  A motion or demurrer once filed shall not be withdrawn without the consent of the adverse party in writing, or given in open court, or of the court.
[R60, §2870; C73, §2642; C97, §3556; C24, 27, 31, 35, 39, §11139; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §619.5]