Widget.errorBell
void errorBell()Notifies the user about an input-related error on this widget. If the #GtkSettings:gtk-error-bell setting is true, it calls [gdk.window.Window.beep], otherwise it does nothing.
Note that the effect of [gdk.window.Window.beep] can be configured in many ways, depending on the windowing backend and the desktop environment or window manager that is used.