OutgoingMessage::merge

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

        $this->id = ($message->id !== null) ? $message->id : $this->id;
        $this->body = ($message->body !== null) ? $message->body : $this->body;
        $this->expiry = ($message->expiry !== null) ? $message->expiry : $this->expiry;
        $this->created = ($message->created !== null) ? $message->created : $this->created;
        $this->sender = ($message->sender !== null) ? $message->sender : $this->sender;
    }