Returning any error will also cancel the stream remotely.

CAREFUL: When utilizing two-way communication, it is important to ensure that the remote handler is not blocked on a send.
If the remote handler is blocked on a send, and the client is trying to send without the remote receiving, 
the operation would become deadlocked if the channels are full.

### Typed handlers

        }

        override fun onMessage(
          webSocket: WebSocket,
          bytes: ByteString,
        ) {
          webSocket.send(bytes)
        }

        override fun onMessage(
          webSocket: WebSocket,
          text: String,
        ) {
          webSocket.send(text)
        }

        override fun onClosing(
          webSocket: WebSocket,
          code: Int,
          reason: String,

	QueueLength int

	// TotalMessages is the total number of messages sent in the lifetime of the target
	TotalMessages int64

	// FailedMessages should log message count that failed to send.
	FailedMessages int64

                                    /* WordCount thru dataOffset always 27 */
                readn( in, BUF, 4 + off, 27 ); off += 27;
                resp.decode( BUF, 4 );
                                              /* EMC can send pad w/o data */
                int pad = r.dataOffset - off;
                if (r.byteCount > 0 && pad > 0 && pad < 4)
                    readn( in, BUF, 4 + off, pad);

                if (r.dataLength > 0)

    /**
     * @param request
     * @param params
     * @return response message
     * @throws CIFSException
     */
    <T extends CommonServerMessageBlockResponse> T send ( Request<T> request, RequestParam... params ) throws CIFSException;

	// global Trace system to send HTTP request/response
	// and Storage/OS calls info to registered listeners.
	globalTrace = pubsub.New[madmin.TraceInfo, madmin.TraceType](8)

	// global Listen system to send S3 API events to registered listeners
	globalHTTPListen = pubsub.New[event.Event, pubsub.Mask](0)

	// global console system to send console logs to
	// registered listeners

SmbComReadAndX request = new SmbComReadAndX( file.fid, fp, r, null );
if( file.type == SmbFile.TYPE_NAMED_PIPE ) {
    request.minCount = request.maxCount = request.remaining = 1024;
}
                file.send( request, response );
            } catch( SmbException se ) {
                if( file.type == SmbFile.TYPE_NAMED_PIPE &&
                        se.getNtStatus() == NtStatus.NT_STATUS_PIPE_BROKEN ) {

app = FastAPI()


def write_notification(email: str, message=""):
    with open("log.txt", mode="w") as email_file:
        content = f"notification for {email}: {message}"
        email_file.write(content)


@app.post("/send-notification/{email}")
async def send_notification(email: str, background_tasks: BackgroundTasks):
    background_tasks.add_task(write_notification, email, message="some notification")

    var finished: Boolean = false,
  ) : Sink {
    /**
     * Buffer of outgoing data. This batches writes of small writes into this sink as larges frames
     * written to the outgoing connection. Batching saves the (small) framing overhead.
     */
    private val sendBuffer = Buffer()

    /** Trailers to send at the end of the stream. */

<h3 id="chan">Channel communication</h3>

<p>
Channel communication is the main method of synchronization
between goroutines.  Each send on a particular channel
is matched to a corresponding receive from that channel,
usually in a different goroutine.
</p>

<p class="rule">
A send on a channel is synchronized before the completion of the
corresponding receive from that channel.
</p>

<p>
This program:
</p>