gtk/app_chooser.go
func (v *AppChooserButton) SetActiveCustomItem(name string) {
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_app_chooser_button_set_active_custom_item(v.native(), (*C.gchar)(cstr))
}
func (v *AppChooserButton) SetActiveCustomItem(name string) {
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_app_chooser_button_set_active_custom_item(v.native(), (*C.gchar)(cstr))
}
// SetActiveCustomItem() is a wrapper around gtk_app_chooser_button_set_active_custom_item().