Massachusetts General Laws Part III. Courts, Judicial Officers and Proceedings in Civil Cases (Ch. 211-262) Ch. 215, § 13

A judge of the probate court by whom a case or matter is heard for final determination may reserve and report the evidence and all questions of law therein for consideration of the appeals court, and thereupon like proceedings shall be had as upon appeal. And if, upon making an interlocutory judgment, decree or order, he is of opinion that it so affects the merits of the controversy that the matter ought, before further proceedings, to be determined by the appeals court, he may report the question for that purpose, and stay all further proceedings except such as are necessary to preserve the rights of the parties.