Is a sealed transcript sufficient to be used as evidence for appellate review?

People v. Myles, supra, 53 Cal.4th at p. 1209, says, "The sealed transcript that is before us, in which the court 'state[d] for the record what documents it examined,' is adequate for purposes of conducting a meaningful appellate review." Under that interpretation of applicable precedent, the trial court does exactly what it did here: opens the file, recites its contents, tells us it finds nothing discoverable, and denies disclosure. We then receive a transcript that tells us "what documents [the court] examined." I am unable to understand how we can provide meaningful review under those circumstances.