gtk/app_chooser.go
func (v *AppChooserButton) SetShowDefaultItem(setting bool) {
	C.gtk_app_chooser_button_set_show_default_item(v.native(), gbool(setting))
}
func (v *AppChooserButton) SetShowDefaultItem(setting bool) {
	C.gtk_app_chooser_button_set_show_default_item(v.native(), gbool(setting))
}
// SetShowDefaultItem() is a wrapper around gtk_app_chooser_button_set_show_default_item().