NS_ASSERTION(!mPopupSetFrame, "Popup set is already defined! Only 1 allowed."); if (!mPopupSetFrame) mPopupSetFrame = aPopupSet;
mPopupSetFrame = aPopupSet;
nsRootBoxFrame::SetPopupSetFrame(nsIFrame* aPopupSet){  NS_ASSERTION(!mPopupSetFrame, "Popup set is already defined! Only 1 allowed.");  if (!mPopupSetFrame)     mPopupSetFrame = aPopupSet;  return NS_OK;}