* </p>
 * <p>
 * The default filter allows common safe classes like primitives, arrays, String,
 * Number types, collections, and classes in the org.codelibs package. For custom
 * requirements, use the overloaded methods that accept a custom filter.
 * </p>
 *
 * @author higa
 */
public abstract class SerializeUtil {

    /**
     * Do not instantiate.
     */
    protected SerializeUtil() {
    }

---

Another useful case is when you want to have keys of another type (e.g., `int`).

That's what we are going to see here.

In this case, you would accept any `dict` as long as it has `int` keys with `float` values:

{* ../../docs_src/body_nested_models/tutorial009_py310.py hl[7] *}

/// tip

Keep in mind that JSON only supports `str` as keys.

> Host: localhost:9000
> User-Agent: curl/7.81.0
> Accept: */*
>

   * @since 23.0
   */
  @J2ktIncompatible
  @GwtIncompatible // java.util.concurrent.ScheduledExecutorService
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  // TODO(cpovirk): Return ListenableScheduledFuture?
  public static <O extends @Nullable Object> ListenableFuture<O> scheduleAsync(
      AsyncCallable<O> callable,
      long delay,

// and the GODEBUG environment variable contains `zipinsecurepath=0`,
// OpenReader returns the reader with an ErrInsecurePath error.
// A future version of Go may introduce this behavior by default.
// Programs that want to accept non-local names can ignore
// the ErrInsecurePath error and use the returned reader.
func OpenReader(name string) (*ReadCloser, error) {
	f, err := os.Open(name)
	if err != nil {
		return nil, err
	}

      )
    }

    val headerAccept = response.header("Sec-WebSocket-Accept")
    val acceptExpected = (key + WebSocketProtocol.ACCEPT_MAGIC).encodeUtf8().sha1().base64()
    if (acceptExpected != headerAccept) {
      throw ProtocolException(
        "Expected 'Sec-WebSocket-Accept' header value '$acceptExpected' but was '$headerAccept'",
      )
    }

    return response.socket

            logger.debug("url={}", url);
        }
        try (CurlResponse response = Curl.get(url)
                .header("Authorization", "Bearer " + user.getAuthenticationResult().accessToken())
                .header("Accept", "application/json")
                .execute()) {
            final Map<String, Object> contentMap = response.getContent(OpenSearchCurl.jsonParser());
            if (logger.isDebugEnabled()) {

        IllegalStateException innerException = new IllegalStateException("Invalid state");
        OutOfMemoryError middleError = new OutOfMemoryError("Memory exhausted");
        // Note: OutOfMemoryError constructor doesn't accept cause, so we create a wrapper
        RuntimeException outerException = new RuntimeException("Wrapper", middleError);
        SsoProcessException exception = new SsoProcessException(message, outerException);

  * As part of preparation in 1.2 for adding support for protocol buffers (and the
direct YAML support in the API available today), the Content-Type and Accept
headers are now properly handled as per the HTTP spec.  As a consequence, if
you had a client that was sending an invalid Content-Type or Accept header to
the API, in 1.2 you will either receive a 415 or 406 error.
The only client

    server.enqueue(MockResponse.Builder().body("hello world").build())
    val url = server.url("/").toUrl()
    val connection = url.openConnection() as HttpURLConnection
    connection.setRequestProperty("Accept-Language", "en-US")
    val reader = BufferedReader(InputStreamReader(connection.inputStream, UTF_8))
    assertThat(connection.responseCode).isEqualTo(HttpURLConnection.HTTP_OK)