serializePayload() публичный Метод

public serializePayload ( array $payload ) : string
$payload array
Результат string
 /**
  * Insert an event
  *
  * @param StreamName $streamName
  * @param Message $e
  * @return void
  */
 private function insertEvent(StreamName $streamName, Message $e)
 {
     $eventArr = $this->messageConverter->convertToArray($e);
     MessageDataAssertion::assert($eventArr);
     $eventData = ['event_id' => $eventArr['uuid'], 'version' => $eventArr['version'], 'event_name' => $eventArr['message_name'], 'payload' => $this->payloadSerializer->serializePayload($eventArr['payload']), 'created_at' => $eventArr['created_at']->format('Y-m-d\\TH:i:s.u')];
     foreach ($eventArr['metadata'] as $key => $value) {
         $eventData[$key] = (string) $value;
     }
     $this->connection->insert($this->getTable($streamName), $eventData);
 }