void Gtk_window_set_default(int ARI, ei_x_buff *XBUF, char *B, int *I){
gboolean Gtk_window_set_default(int ARI, ei_x_buff *XBUF, char *B, int *I){
void Gtk_window_set_default(int ARI, ei_x_buff *XBUF, char *B, int *I){  GtkWindow* object;  GtkWidget* default_widget;  /* no return value */  if ( ! gn_check_arity(XBUF, 2, ARI) ) return;  if ( ! gn_get_arg_object(XBUF, B, I, GTK_TYPE_WINDOW, (GObject**)&object) ) return;  if ( ! gn_get_arg_object(XBUF, B, I, GTK_TYPE_WIDGET, (GObject**)&default_widget) ) return;  gtk_window_set_default(object, default_widget);  gn_put_void(XBUF);}