void ModalWidgetList::Append(GtkWidget *aWidget) {
void ModalWidgetList::Append(nsWidget *aWidget) {
void ModalWidgetList::Append(GtkWidget *aWidget) {  ModalWidgetList *newElement = new ModalWidgetList(aWidget);  NS_ASSERTION(newElement, "out of memory in modal widget list creation");  if (!newElement)    return;  if (gModalWidgets) {    newElement->mPrev = gModalWidgets->mLast;    gModalWidgets->mLast->mNext = newElement;    gModalWidgets->mLast = newElement;  } else {    newElement->mLast = newElement;    gModalWidgets = newElement;  }}