Can a defendant seek appellate review of the validity of a search or seizure following a conviction?

A defendant may seek appellate review of the validity of a search or seizure following a conviction "notwithstanding the fact that such judgment of conviction is predicated upon a plea of guilty." ( 1538.5, subd. (m).) However, the statute authorizing such appellate review specifies that to obtain such review, the defendant must "at some stage of the proceedings prior to conviction [have] moved for the return of property or the suppression of the evidence." (Ibid.) It is well settled that although a motion to suppress may be made in the municipal court ( 1538.5, subd. (f)), the phrase "at some stage of the proceedings" in subdivision (m) means the proceedings in the superior court. (People v. Lilienthal (1978) 22 Cal.3d 891, 896-897, 150 Cal.Rptr. 910, 587 P.2d 706.)