Okla. Stat. tit. 12 § 1147.1
If it shall appear in any suit or proceeding in a district court involving real estate that any person or persons not in being are or may become entitled to, or may upon coming into being claim to be entitled to, any future interest in such real estate, legal or equitable, and if it further appears to be expedient or for the best interests of all concerned, the court may by order determine the rights of all living persons in such real estate and the circumstances under which persons not then in being may claim an interest therein in the future and determine the nature and extent of any such interest or claim and may direct the sale of the full title to the real estate in which such future interest may be claimed, and direct that the proceeds of the sale shall be held as a trust in lieu of the real estate so sold to be administered as hereinafter provided.
Okla. Stat. tit. 12, § 1147.1