Does a defendant have a right to confront adverse witnesses at an in-camera hearing?

7 Defendant asserts the Sixth Amendment right to counsel required his counsel's presence during the in-camera hearing, and his Sixth Amendment confrontation right required revelation of the adverse witnesses' prior convictions. With regard to the first claim, we do not believe the Sixth Amendment confers a right to be present during proceedings on privileged matters, nor do the cases defendant cites so hold. And for the reasons set forth in the text, we conclude that any violation of defendant's federal confrontation rights was harmless beyond a reasonable doubt. (Chapman v. California (1967) 386 U.S. 18, 87 S.Ct. 824, 17 L.Ed.2d 705.)