ByteArrayInputStream bais = new ByteArrayInputStream(data);
        SessionRetargetResponsePacket packet = new SessionRetargetResponsePacket();

        // Create a buffer large enough to hold the read bytes
        byte[] buffer = new byte[6];
        int bytesRead = packet.readTrailerWireFormat(bais, buffer, 0);

        // Verify that 6 bytes were read, which is the expected length.

  }

  /**
   * Creates a {@code ObjectCountLinkedHashMap} instance, with a high enough "initial capacity" that
   * it <i>should</i> hold {@code expectedSize} elements without growth.
   *
   * @param expectedSize the number of elements you expect to add to the returned set
   * @return a new, empty {@code ObjectCountLinkedHashMap} with enough capacity to hold {@code
   *     expectedSize} elements without resizing

# Advanced User Guide { #advanced-user-guide }

## Additional Features { #additional-features }

The main [Tutorial - User Guide](../tutorial/index.md){.internal-link target=_blank} should be enough to give you a tour through all the main features of **FastAPI**.

In the next sections you will see other options, configurations, and additional features.

/// tip

The next sections are **not necessarily "advanced"**.

      var multipleReadyTasks = false

      // Decide what to run. This loop's goal wants to:
      //  * Find out what this thread should do (either run a task or sleep)
      //  * Find out if there's enough work to start another thread.
      eachQueue@ for (queue in readyQueues) {
        val candidate = queue.futureTasks[0]
        val candidateDelay = maxOf(0L, candidate.nextExecuteNanoTime - now)

        when {

      added += q.drainTo(buffer, numElements - added);
      if (added < numElements) { // not enough elements immediately available; will have to poll
        E e = q.poll(deadline - System.nanoTime(), NANOSECONDS);
        if (e == null) {
          break; // we already waited enough, and there are no more elements in sight
        }
        buffer.add(e);
        added++;
      }
    }

  }

  /**
   * Creates a {@code CompactLinkedHashSet} instance, with a high enough "initial capacity" that it
   * <i>should</i> hold {@code expectedSize} elements without rebuilding internal data structures.
   *
   * @param expectedSize the number of elements you expect to add to the returned set
   * @return a new, empty {@code CompactLinkedHashSet} with enough capacity to hold {@code
   *     expectedSize} elements without resizing

				continue
			}
			if yes := o.shouldSkip(ctx, entry); yes {
				// when we have not enough results, record the skipped entry
				if o.Limit > 0 && results.len() < o.Limit {
					results.lastSkippedEntry = entry.name
				}
				continue
			}
			if o.Limit > 0 && results.len() >= o.Limit {
				// We have enough and we have more.
				// Do not return io.EOF
				if resCh != nil {
					resErr = nil

 *       {@link NdrBuffer} so that the correct method is called with
 *       the correct argument.</li>
 *   <li>passing {@code null} throws {@link NullPointerException}.
 * </ul>
 *
 * The buffer is created with enough capacity for a 64‑bit value.
 */
@ExtendWith(MockitoExtension.class)
public class NdrHyperTest {

    /**
     * Tests a simple round‑trip encode → decode retains the original value.
     */
    @Test

    private NdrBuffer buf;

    @BeforeEach
    void setUp() {
        // 10 bytes is more than enough for the 2-byte short
        raw = new byte[10];
        buf = new NdrBuffer(raw, 0);
    }

    /**
     * Validate that the constructor masks the supplied value to its
     * lowest 8 bits (NdrShort incorrectly masks to 8 bits even though it's a short).
     */
    @ParameterizedTest

```Python hl_lines="3  5-6"
{
    "name": "Baz",
    "description": None,
    "price": 50.2,
    "tax": 10.5,
    "tags": []
}
```

FastAPI is smart enough (actually, Pydantic is smart enough) to realize that, even though `description`, `tax`, and `tags` have the same values as the defaults, they were set explicitly (instead of taken from the defaults).

So, they will be included in the JSON response.

/// tip