/**
  * Get an instance of type \Colada\Europeana\Payload\PayloadHandlerInterface
  *
  * This factory method will create a handler object based on the type of the
  * PayloadInterface objec which is passed as a method argument.
  *
  * @param \Colada\Europeana\Payload\PayloadInterface $payload
  */
 public static function getHandler(PayloadInterface $payload)
 {
     $handler = $payload->getHandlerClass();
     return $handler::create($payload);
 }