subjectPublicKey = BitString(publicKeyBytes, 0),
      )
    return CertificateAdapters.subjectPublicKeyInfo.toDer(subjectPublicKeyInfo)
  }

  /** Returns a byte string that differs from this one by one bit. */
  private fun ByteString.offByOneBit(): ByteString =
    Buffer()
      .write(this, 0, size - 1)
      .writeByte(this[size - 1].toInt() xor 1)
      .readByteString()

                        new Trans2SetFileInformationResponse(th.getConfig()), RequestParam.NO_RETRY);
            } else {
                // this is the original, COM_WRITE allows truncation but no 64 bit offsets
                final SmbComWriteResponse rsp = new SmbComWriteResponse(th.getConfig());
                th.send(new SmbComWrite(th.getConfig(), fh.getFid(), (int) (newLength & 0xFFFFFFFFL), 0, this.tmp, 0, 0), rsp,

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## Update the App with Multiple Models { #update-the-app-with-multiple-models }

Now let's **refactor** this app a bit to increase **security** and **versatility**.

If you check the previous app, in the UI you can see that, up to now, it lets the client decide the `id` of the `Hero` to create. 😱

      throw IOException("FRAME_SIZE_ERROR: $length")
    }
    val type = source.readByte() and 0xff
    val flags = source.readByte() and 0xff
    val streamId = source.readInt() and 0x7fffffff // Ignore reserved bit.
    if (type != TYPE_WINDOW_UPDATE && logger.isLoggable(FINE)) {
      logger.fine(frameLog(true, streamId, length, type, flags))
    }

    if (requireSettings && type != TYPE_SETTINGS) {

        || (stimuli.length >= 5 && removes > 2)) {
      // removes are the most expensive thing to test, since they often throw exceptions with stack
      // traces, so we test them a bit less aggressively
      return;
    }

    MultiExceptionListIterator reference = new MultiExceptionListIterator(expectedElements);
    I target = newTargetIterator();
    for (int i = 0; i < stimuli.length; i++) {

   *
   * <p>For the case of {@link RoundingMode#HALF_EVEN}, this implementation uses the IEEE 754
   * default rounding mode: if the two nearest representable values are equally near, the one with
   * the least significant bit zero is chosen. (In such cases, both of the nearest representable
   * values are even integers; this method returns the one that is a multiple of a greater power of
   * two.)
   *

To do that, first build all the docs:

<div class="termy">

```console
// Use the command "build-all", this will take a bit
$ python ./scripts/docs.py build-all

Building docs for: en
Building docs for: es
Successfully built docs for: es
```

</div>

**FastAPI** is all based on these type hints, they give it many advantages and benefits.

But even if you never use **FastAPI**, you would benefit from learning a bit about them.

/// note

If you are a Python expert, and you already know everything about type hints, skip to the next chapter.

///

## Motivation { #motivation }

Let's start with a simple example:

    }

    NbtAddress doNameQuery(final Name name, InetAddress svr) throws UnknownHostException {
        NbtAddress addr;

        if (name.hexCode == 0x1d && svr == null) {
            svr = this.baddr; // bit of a hack but saves a lookup
        }
        name.srcHashCode = svr != null ? svr.hashCode() : 0;
        addr = getCachedAddress(name);

        /*
         * This is almost exactly like InetAddress.java. See the

  // Timed Get
  // There are a few design constraints to consider
  // * We want to be responsive to small timeouts, unpark() has non trivial latency overheads (I
  //   have observed 12 micros on 64-bit linux systems to wake up a parked thread). So if the
  //   timeout is small we shouldn't park(). This needs to be traded off with the cpu overhead of