@Override
public void add(IsWidget child) {
Widget widget = asWidgetOrNull(child);
if(child instanceof MarkupWidget && widget instanceof DropdownButton) {
MarkupWidget markup = (MarkupWidget) child;
DropdownButton dropdownBase = (DropdownButton) widget;
markup.setWidget(dropdownBase.getTriggerWidget());
markup.asWidget();
}
this.add(widget);
}