/**
  * Return asset constraints
  *
  * @param $key
  * @return array
  */
 public function getAssetConstraints($key)
 {
     $pciConstraints = ['creator' => ['icon', 'hook', 'libraries', 'stylesheets', 'mediaFiles']];
     $this->assetConstraints = array_merge($pciConstraints, $this->assetConstraints);
     return parent::getAssetConstraints($key);
 }