Symfony\Component\Form\AbstractType::setExtensions PHP Méthode

    public function setExtensions(array $extensions)
    {
        foreach ($extensions as $extension) {
            if (!$extension instanceof FormTypeExtensionInterface) {
                throw new UnexpectedTypeException($extension, 'Symfony\Component\Form\FormTypeExtensionInterface');
            }
        }

        $this->extensions = $extensions;
    }