OutgoingMessagesResponse::merge

public function merge(ProtobufMessage $message)
    {
        if ( ! $message instanceof BitrixPullProtobufOutgoingMessagesResponse) {
            throw new InvalidArgumentException(sprintf('Argument 1 passed to %s must be a %s, %s given', __METHOD__, __CLASS__, get_class($message)));
        }

        $this->messages = ($message->messages !== null) ? $message->messages : $this->messages;
    }