byte[] mic = new byte[] { 9, 9, 9 };
        NegTokenTarg original = new NegTokenTarg(NegTokenTarg.ACCEPT_COMPLETED, mech, tokenArray, mic);

        // Act – serialise and parse back
        byte[] bytes = original.toByteArray();
        NegTokenTarg roundTrip = new NegTokenTarg(bytes);

        // Assert – all getters match the original values

 *
 * This task verifies that the computed target runtimes for each project properly reflect
 * the required target runtimes of all other projects. Optionally, it can write the correct
 * target runtimes back to the build files.
 *
 * @see [gradlebuild.identity.extension.GradleModuleExtension.requiredRuntimes]
 * @see [gradlebuild.identity.extension.GradleModuleExtension.computedRuntimes]
 */

Let's use the tools provided by **FastAPI** to handle security.

## How it looks { #how-it-looks }

Let's first just use the code and see how it works, and then we'll come back to understand what's happening.

## Create `main.py` { #create-main-py }

Copy the example in a file `main.py`:

{* ../../docs_src/security/tutorial001_an_py310.py *}

## Run it { #run-it }

/// info

	"aaa": {
		User:               "Alice",
		MaxValiditySeconds: 3600,
		Claims: map[string]interface{}{
			"groups": []string{"data-science"},
		},
	},
	"bbb": {
		User:               "Bart",
		MaxValiditySeconds: 3600,
		Claims: map[string]interface{}{
			"groups": []string{"databases"},
		},
	},
}

func mainHandler(w http.ResponseWriter, r *http.Request) {
	token := r.FormValue("token")

var errDiscardedBytes = errors.New("ReadAt of discarded bytes")

func (ss *suffixSaver) ReadAt(p []byte, off int64) (n int, err error) {
	back := ss.size - off
	if back > int64(ss.keep) {
		return 0, errDiscardedBytes
	}
	suf := ss.Suffix()
	n = copy(p, suf[len(suf)-int(back):])
	if n != len(p) {
		err = io.EOF
	}
	return
}

func (ss *suffixSaver) Suffix() []byte {
	if len(ss.buf) < ss.keep {

                                    </div>
                                </div>
                                <div class="card-footer">
                                    <button type="submit" class="btn btn-default" name="back"
                                            value="<la:message key="labels.design_button_back" />">
                                        <i class="fa fa-arrow-circle-left" aria-hidden="true"></i>

 *
 * All event methods must execute fast, without external locking, cannot throw exceptions,
 * attempt to mutate the event parameters, or be reentrant back into the client.
 * Any IO - writing to files or network should be done asynchronously.
 */
internal abstract class ConnectionListener {
  /**
   * Invoked as soon as a call causes a connection to be started.
   */

                    0, pollingFetchSize, SortBuilders.scoreSort().order(SortOrder.DESC));
        } else if (!ORDER_SEQUENTIAL.equals(crawlOrder)) {
            logger.warn("Invalid crawl order specified: {}. Falling back to sequential.", crawlOrder);
        }
        return super.fetchUrlQueueList(sessionId);
    }

		h := xxh3.Hash(dst)
		dst = binary.LittleEndian.AppendUint32(dst, uint32(h))
	}
	return m.parent.send(m.ctx, dst)
}

// RequestStateless will send a single payload request and stream back results.
// req may not be read/written to after calling.
// TODO: Not implemented
func (m *muxClient) RequestStateless(h HandlerID, req []byte, out chan<- Response) {
	if m.init {

    }

    @Test
    void testOpenConnection_NullSystemProperty_UsesDefaultHandlers() throws Exception {
        // This test verifies that when the system property is null, the handler
        // falls back to using default handlers without throwing NullPointerException.
        System.clearProperty("java.protocol.handler.pkgs");
        setupMockProtocolHandlers();
        URL url = new URL("http://example.com/resource");