Can we reverse a judgment from a reporter's transcript of a hearing where no party presented live witness testimony?

conflicting declarations and there was extensive oral argument as well as questioning of counsel by the trial court, after which the trial court made findings of fact on disputed evidence, which this court must review for substantial evidence. Though Rodriguez acknowledges no party presented live witness testimony at the hearing, she maintains we cannot reverse the judgment without a reporter's transcript because, based on Brockway v. Heilman (1967) 250 Cal.App.2d 807, without such a transcript, " 'the sufficiency of the evidence to support the findings is not open to question.' "³