return CallChildren(SetChildPrevDocCharacterSet, (void*) &aPrevDocCharacterSet);
CallChildren(SetChildPrevDocCharacterSet, (void*) &aPrevDocCharacterSet); return NS_OK;
DocumentViewerImpl::SetPrevDocCharacterSet(const nsACString& aPrevDocCharacterSet){  mPrevDocCharacterSet = aPrevDocCharacterSet;    return CallChildren(SetChildPrevDocCharacterSet,                      (void*) &aPrevDocCharacterSet);}