Frontmost
Window* frontmost = window->Frontmost();
Window* frontmost = window->Frontmost(_Windows(i).FirstWindow(), i);
floating->Frontmost(_Windows(nextWorkspace).FirstWindow(),
window->Frontmost(_Windows(i).FirstWindow(), i));
window->Frontmost(CurrentWindows().FirstWindow(),
stackWindow->Frontmost(
movedWindow->Frontmost(_Windows(index).FirstWindow(),
Window* Frontmost(Window* first = NULL,