And then it just returns a `dict` containing those values.

/// info

FastAPI added support for `Annotated` (and started recommending it) in version 0.95.0.

If you have an older version, you would get errors when trying to use `Annotated`.

Make sure you [Upgrade the FastAPI version](../../deployment/versions.md#upgrading-the-fastapi-versions){.internal-link target=_blank} to at least 0.95.1 before using `Annotated`.

///

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

Typed handlers are handlers that have a specific type for the request and response payloads.

  public void testAssignableParameterizedTypeToClass() {
    @SuppressWarnings("rawtypes") // Trying to test raw class
    TypeToken<List> tokL = new TypeToken<List>() {};
    assertTrue(tokL.isSupertypeOf(StringList.class));
    assertTrue(tokL.isSupertypeOf(StringList.class.getGenericInterfaces()[0]));

    @SuppressWarnings("rawtypes") // Trying to test raw class
    TypeToken<Second> tokS = new TypeToken<Second>() {};

    reader.close();
  }

  @Override
  public int read() throws IOException {
    return (read(singleByte) == 1) ? UnsignedBytes.toInt(singleByte[0]) : -1;
  }

  // TODO(chrisn): Consider trying to encode/flush directly to the argument byte
  // buffer when possible.
  @Override
  public int read(byte[] b, int off, int len) throws IOException {
    // Obey InputStream contract.

    reader.close();
  }

  @Override
  public int read() throws IOException {
    return (read(singleByte) == 1) ? UnsignedBytes.toInt(singleByte[0]) : -1;
  }

  // TODO(chrisn): Consider trying to encode/flush directly to the argument byte
  // buffer when possible.
  @Override
  public int read(byte[] b, int off, int len) throws IOException {
    // Obey InputStream contract.

     */
    @SuppressWarnings ( "resource" )
    private static void serverSideCopy ( SmbFile src, SmbFile dest, SmbTreeHandleImpl sh, SmbTreeHandleImpl dh, boolean write ) throws CIFSException {
        log.debug("Trying server side copy");
        SmbFileHandleImpl dfd = null;
        try {
            long size;
            byte[] resumeKey;

            // despite there being a resume key, we still need an open file descriptor?

You could need to tell the client that:

* The client doesn't have enough privileges for that operation.
* The client doesn't have access to that resource.
* The item the client was trying to access doesn't exist.
* etc.

In these cases, you would normally return an **HTTP status code** in the range of **400** (from 400 to 499).

herself in a long, low hall, which was lit up by a row of lamps
hanging from the roof.

  There were doors all round the hall, but they were all locked;
and when Alice had been all the way down one side and up the
other, trying every door, she walked sadly down the middle,
wondering how she was ever to get out again.

  Suddenly she came upon a little three-legged table, all made of
solid glass; there was nothing on it except a tiny golden key,

    assert200Http2Response(execute(sanUrl), "san.com")
    assertThat(client.connectionPool.connectionCount()).isEqualTo(1)
  }

  /**
   * This is an extraordinary test case. Here's what it's trying to simulate.
   * - 2 requests happen concurrently to a host that can be coalesced onto a single connection.
   * - Both request discover no existing connection. They both make a connection.

            try {
                transport.wait();
            } catch (InterruptedException ie) {
                throw new SmbException(ie.getMessage(), ie);
            }
        }
        connectionState = 1; // trying ...

        try {
            transport.connect();

            /*
             * Session Setup And X Request / Response
             */
    
            if( transport.log.level >= 4 )