Gtk.Widget.prototype.show_now

function show_now():void {
    // Gjs wrapper for gtk_widget_show_now()
}

Shows a widget. If the widget is an unmapped toplevel widget (i.e. a Gtk.Window that has not yet been shown), enter the main loop and wait for the window to actually be mapped. Be careful; because the main loop is running, anything can happen during this function.