When the court decides in favor of the assignee, it shall adjudge such judgment against the trustee to be the property of the assignee, and it may be enforced by him or her at his or her expense in the name of the plaintiff in the first action, if it has not been previously paid. When the trustee has paid it in whole or in part to the plaintiff in the trustee process, the assignee shall have judgment against such plaintiff for the sum so paid, and may enforce against the trustee any part of the judgment not paid.