In accordance with the strong public policy against piecemeal appeals in a single litigation, nonfinal Appellate Division orders are generally not appealable to the Court of Appeals, except under certain limited circumstances. Nevertheless,

the correctness of a final determination may often turn on the correctness of such a nonfinal order, and the appeal from the final determination would then be pointless if that order could not also be reviewed.
It has accordingly long been the practice in this State to permit review, on an appeal from a final determination, of any nonfinal determination necessarily affecting the final determination which has not previously been reviewed by the appellate court.