static $has_many = array(
        "ImageGallery" => "Image"
    );


        $fields->removeByName("ImageGallery");
        $fields->addFieldToTab("Root.Main", $ifPortImage = new UploadField('ImageGallery', 'Portfolio Gallery Images'));
        $ifPortImage->setConfig('allowedMaxFileNumber', 100)->setFolderName('assets/');
        $ifPortImage->getValidator()->setAllowedExtensions(array('jpg', 'jpeg', 'png', 'gif'));


        return $fields;