code: void notifyOmemoMessageReceived(Stanza stanza, OmemoMessage.Received decryptedMessage) {
          for (OmemoMessageListener l : omemoMessageListeners) {
              l.onOmemoMessageReceived(stanza, decryptedMessage);
          }
      }
docs: Notify all registered OmemoMessageListeners about a received OmemoMessage.
  
  @param stanza original stanza
  @param decryptedMessage decrypted OmemoMessage.