lenient().when(fh.isValid()).thenReturn(true);
        lenient().when(fh.getTree()).thenReturn(tree);
        when(fh.getFid()).thenReturn(99);

        // Mock send to just echo the provided response instance
        when(tree.send(any(TransTransactNamedPipe.class), any(TransTransactNamedPipeResponse.class), eq(RequestParam.NO_RETRY)))
                .thenAnswer(inv -> inv.getArgument(1));

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

            when(existsResponse.getAttributes()).thenReturn(0); // Not found
            when(mockTreeHandle.send(any(), any(SmbComQueryInformationResponse.class))).thenReturn(existsResponse);

            // Mock the actual mkdir call
            when(mockTreeHandle.send(any(SmbComCreateDirectory.class), any(SmbComBlankResponse.class)))
                    .thenReturn(mock(SmbComBlankResponse.class));

            <button onclick="connect(event)">Connect</button>
            <hr>
            <label>Message: <input type="text" id="messageText" autocomplete="off"/></label>
            <button>Send</button>
        </form>
        <ul id='messages'>
        </ul>
        <script>
        var ws = null;
            function connect(event) {
                var itemId = document.getElementById("itemId")

            }
            sendRateLimitResponse(httpResponse, rateLimitHelper.getRetryAfterSeconds());
            return;
        }

        chain.doFilter(request, response);
    }

    /**
     * Send a 403 Forbidden response for blocked IPs.
     * @param response the HTTP response
     * @throws IOException if an I/O error occurs
     */

If you open a GitHub Issue, here is our policy:

1.  It must be a bug/performance issue or a feature request or a build issue or
    a documentation issue (for small doc fixes please send a PR instead).
1.  Make sure the Issue Template is filled out.
1.  The issue should be related to the repo it is created in.

**Here's why we have this policy:** We want to focus on the work that benefits
the whole community, e.g., fixing bugs and adding features. Individual support

```mermaid
sequenceDiagram
    participant App
    participant Client

    App->>App: Produce Item 1
    App->>Client: Send Item 1
    App->>App: Produce Item 2
    Client->>Client: Process Item 1
    App->>Client: Send Item 2
    App->>App: Produce Item 3
    Client->>Client: Process Item 2
    App->>Client: Send Item 3
    Client->>Client: Process Item 3
    Note over App: Keeps producing...
    Note over Client: Keeps consuming...

            """
        ),
    ] = None
    raw_data: Annotated[
        str | None,
        Doc(
            """
            Raw string to send as the `data:` field **without** JSON encoding.

            Use this when you need to send pre-formatted text, HTML fragments,
            CSV lines, or any non-JSON payload. The string is placed directly
            into the `data:` field as-is.

          invokeStartEvent = false
        }
        if (responseBuilder == null) {
          if (requestBody.isDuplex()) {
            // Prepare a duplex body so that the application can send a request body later.
            exchange.flushRequest()
            val bufferedRequestBody = exchange.createRequestBody(request, true).buffer()
            requestBody.writeTo(bufferedRequestBody)
          } else {

             */
            out.write(BUF, 0, 4 + n);
        }
    }

    /**
     * Internal method to send a request to the server.
     *
     * @param request the request to send
     * @throws IOException if an I/O error occurs
     */
    protected void doSend0(final Request request) throws IOException {
        try {
            doSend(request);