NonSerializableMemoizingSupplier(Supplier<T> delegate) {
      this.delegate = checkNotNull(delegate);
    }

    @Override
    @ParametricNullness
    @SuppressWarnings("unchecked") // Cast from Supplier<Void> to Supplier<T> is always valid
    public T get() {
      // Because Supplier is read-heavy, we use the "double-checked locking" pattern.
      if (delegate != SUCCESSFULLY_COMPUTED) {

following in mind:

* **JSON configuration files that contain fields with incorrect case will no longer be valid. You must correct these files before upgrading.** When specifying keys in JSON resource definitions during direct API server communication, the keys are case-sensitive. A bug introduced in Kubernetes 1.8 caused the API server to accept a request with incorrect case and coerce it to correct case, but this behaviour has been fixed in 1.11 and the API server will once again be enforcing...

#### Storage

- When PodInfoOnMount is enabled for a CSI driver, the new csi.storage.k8s.io/ephemeral parameter in the volume context allows a driver's NodePublishVolume implementation to determine on a case-by-case basis whether the volume is ephemeral or a normal persistent volume ([#79983](https://github.com/kubernetes/kubernetes/pull/79983), [@pohly](https://github.com/pohly))

        MockNode divNode = new MockNode("div");
        assertTrue(tag.matches(divNode));

        MockNode spanNode = new MockNode("span");
        assertFalse(tag.matches(spanNode));

        // Case insensitive test
        MockNode divUpperNode = new MockNode("DIV");
        assertTrue(tag.matches(divUpperNode));
    }

    public void test_matches_withId() {
        PrunedTag tag = new PrunedTag("div");

  private static <K, V> ImmutableSortedMap<K, V> copyOfInternal(
      Map<? extends K, ? extends V> map, Comparator<? super K> comparator) {

    if (map instanceof ImmutableSortedMap) {
      // TODO: Prove that this cast is safe, even though
      // Collections.unmodifiableSortedMap requires the same key type.
      @SuppressWarnings("unchecked")
      ImmutableSortedMap<K, V> kvMap = (ImmutableSortedMap<K, V>) map;

            assertEquals(((Smb2Constants.SMB2_HEADER_LENGTH + 48 + 7 + 7) / 8) * 8, request.size());
        }
    }

    @Nested
    @DisplayName("Edge Case Tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle null data with non-zero length")
        void testNullDataNonZeroLength() {
            request.setData(null, 0, 100);

	rinfo.Targets = append(rinfo.Targets, ResyncTarget{Arn: tgtArns[0], ResetID: target.ResetID})
	if err = globalBucketTargetSys.SetTarget(ctx, bucket, &target, true); err != nil {
		switch err.(type) {
		case RemoteTargetConnectionErr:
			writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrReplicationRemoteConnectionError, err), r.URL)
		default:
			writeErrorResponseJSON(ctx, w, toAPIError(ctx, err), r.URL)
		}

Bạn cũng có thể trả về Pydantic model (bạn sẽ thấy nhiều hơn về nó sau).

Có nhiều object và model khác nhau sẽ được tự động chuyển đổi sang JSON (bao gồm cả ORM,...). Thử sử dụng loại ưa thích của bạn, nó có khả năng cao đã được hỗ trợ.

## Tóm lại

* Import `FastAPI`.
* Tạo một `app` instance.
* Viết một **decorator cho đường dẫn toán tử** (giống như `@app.get("/")`).

   *
   * @throws NullPointerException if {@code elements} contains a null element
   */
  public static <E> ImmutableList<E> copyOf(Iterator<? extends E> elements) {
    // We special-case for 0 or 1 elements, but going further is madness.
    if (!elements.hasNext()) {
      return of();
    }
    E first = elements.next();
    if (!elements.hasNext()) {
      return of(first);
    } else {

   * implementation, it is <i>possible</i> that this method will return a different number of chars
   * than would be returned by reading all of the chars.
   *
   * <p>In either case, for mutable sources such as files, a subsequent read may return a different
   * number of chars if the contents are changed.
   *
   * @throws IOException if an I/O error occurs while reading the length of this source