Symfony\Bridge\Twig\Extension\FormExtension::__set PHP Method

    public function __set($name, $value)
    {
        if ('renderer' === $name) {
            @trigger_error(sprintf('Using the "%s::$renderer" property is deprecated since version 3.2 as it will be removed in 4.0.', __CLASS__), E_USER_DEPRECATED);
        }
        $this->{$name} = $value;
    }