Ojs\AdminBundle\Form\Type\AdminAnnouncementType::buildForm PHP Method

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('title', 'text')->add('content', 'url', array('required' => false, 'label' => 'url'))->add('image', 'jb_image_ajax', array('endpoint' => 'announcement'));
    }