Method process

examples/demo.php:4050–4056

* @template T * @param Closure(int, T): void $handler * @return T */

(Closure $handler)

     * @return T
     */
    public function process(Closure $handler): mixed
    {
        $params = (new \ReflectionFunction($handler))->getParameters();
        $type = $params[1]->getType();
        $class = $type instanceof \ReflectionNamedType ? $type->getName() : 'stdClass';
        return (new \ReflectionClass($class))->newInstanceWithoutConstructor();
    }
}

class ScaffoldingTemplateCallableHolder