protected function getDetailFields()
 {
     $fields = parent::getDetailFields();
     $width = $this->getOriginalWidth();
     $height = $this->getOriginalHeight();
     // Show dimensions of original
     if ($width && $height) {
         $fields->insertAfter('ClickableURL', ReadonlyField::create("OriginalWidth", _t('AssetTableField.WIDTH', 'Width'), $width));
         $fields->insertAfter('OriginalWidth', ReadonlyField::create("OriginalHeight", _t('AssetTableField.HEIGHT', 'Height'), $height));
     }
     return $fields;
 }