How have the courts dealt with the issue of whether the court erred in denying defendant's petition?

Counsel has filed a brief under the authority of People v. Wende (1979) 25 Cal.3d 436 and Anders v. California (1967) 386 U.S. 738, setting forth a statement of the case and identifying one potentially arguable issue: whether the court erred in denying defendant's petition. Defendant was offered the opportunity to file a personal supplemental brief, which he has done. Defendant contends the jury convicted him under both a theory of felony murder and the natural and probable consequences doctrine; hence, he maintains the court erred in denying his petition. We affirm.