code: public synchronized void sendMessage(final byte[] message) {
      this.send(ReefServiceProtos.JobStatusProto.newBuilder()
          .setIdentifier(this.jobIdentifier)
          .setState(ReefServiceProtos.State.RUNNING)
          .setMessage(ByteString.copyFrom(message))
          .build());
    }
docs: Send the given byte[] as a message to the client.
  
  @param message