Method is_valid

core/variant/callable.cpp:160–166

}

bool Callable::is_valid() const {
	if (is_custom()) {
		return get_custom()->is_valid();
	} else {
		return get_object() && get_object()->has_method(get_method());
	}
}

Object *Callable::get_object() const {
	if (is_null()) {