FluidTYPO3\Flux\Provider\AbstractProvider::getControllerExtensionKeyFromRecord PHP Method

    public function getControllerExtensionKeyFromRecord(array $row)
    {
        return $this->extensionKey;
    }

 /**
  * @param array $row
  * @return string
  */
 public function getControllerExtensionKeyFromRecord(array $row)
 {
     $action = $this->getControllerActionReferenceFromRecord($row);
     if (FALSE !== strpos($action, '->')) {
         $extensionName = array_shift(explode('->', $action));
         return $extensionName;
     }
     return parent::getControllerExtensionKeyFromRecord($row);
 }