Respect\Config\Container::__invoke PHP Метод

    public function __invoke($spec)
    {
        if (is_callable($spec)) {
            if (is_array($spec)) {
                list($class, $method) = $spec;
                $class = new ReflectionClass($class);
                $object = $class->newInstance();
                $mirror = $class->getMethod($method);
            } else {
                $object = false;
                $mirror = new ReflectionFunction($spec);
            }
            $container = $this;
            $arguments = array_map(function ($param) use($container) {
                if ($paramClass = $param->getClass()) {
                    $paramClassName = $paramClass->getName();
                    return $container->getItem($paramClassName);
                }
            }, $mirror->getParameters());
            if ($object) {
                return $mirror->invokeArgs($object, $arguments);
            }
            return $mirror->invokeArgs($arguments);
        }
        if ((bool) array_filter(func_get_args(), 'is_object')) {
            foreach (func_get_args() as $dependency) {
                $this[get_class($dependency)] = $dependency;
            }
        }
        foreach ($spec as $name => $item) {
            parent::offsetSet($name, $item);
        }
        if ($this->configurator) {
            $this->configure();
        }
        return $this;
    }