}
    }

    @Override
    public DfsReferralDataImpl next() {
        return this.next;
    }

    /**
     * Append another referral to this referral chain
     *
     * @param dr the referral to append
     */
    @Override
    public void append(final DfsReferralDataInternal dr) {
        final DfsReferralDataImpl dri = (DfsReferralDataImpl) dr;

        String testValue = "HELLO WORLD";
        OptionalEntity<String> result = OptionalUtil.ofNullable(testValue);

        assertTrue(result.isPresent());

        // Test that we can chain operations
        String processed = result.map(s -> s.toLowerCase()).orElse("default");

        assertEquals("hello world", processed);

        // Test with null value
        String nullValue = null;

            verify(session).setAttribute("ntlmuser", "user");
            verify(session).setAttribute("ntlmdomain", "TEST_DOMAIN");

            // Verify that the chain continues
            verify(response, never()).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        }
    }

    /**
     * Test the service method with NTLM authentication that fails.

   * part of the smeared hash of the key not covered by the hashtable mask, whereas the low bits are
   * the "next" pointer (pointing to the next entry in the bucket chain), which will always be less
   * than or equal to the hashtable mask.
   *
   * <pre>
   * hash  = aaaaaaaa
   * mask  = 00000fff
   * next  = 00000bbb
   * entry = aaaaabbb
   * </pre>
   *

<img src="/img/python-types/image04.png">

Maintenant que vous avez connaissance du problème, convertissez `age` en <abbr title="string">chaîne de caractères</abbr> grâce à `str(age)` :

{*../../docs_src/python_types/tutorial004.py hl[2] *}

## Déclarer des types

    this.entries = entries;
    this.table = table;
    this.mask = mask;
  }

  /**
   * Checks if the given key already appears in the hash chain starting at {@code keyBucketHead}. If
   * it does not, then null is returned. If it does, then if {@code throwIfDuplicateKeys} is true an
   * {@code IllegalArgumentException} is thrown, and otherwise the existing {@link Entry} is

	defer n.Unlock()
	n.RX = 0
	n.RXSample = 0
	n.lastToConnect = time.Time{}
	n.firstToDisconnect = time.Time{}
}

// Reader to read random data.
type netperfReader struct {
	n   uint64
	eof chan struct{}
	buf []byte
}

func (m *netperfReader) Read(b []byte) (int, error) {
	select {
	case <-m.eof:
		return 0, io.EOF
	default:
	}
	n := copy(b, m.buf)
	atomic.AddUint64(&m.n, uint64(n))

      prev.setFuture(curr);
      prev = curr;
    }
    // prev represents the 'innermost' future
    prev.set("done");
    assertTrue(orig.isDone());
  }

  // Verify that StackOverflowError in a long chain of SetFuture doesn't cause the entire toString
  // call to fail
  @J2ktIncompatible
  @GwtIncompatible
  @AndroidIncompatible // b/391667564: crashes from stack overflows

{* ../../docs_src/first_steps/tutorial001.py hl[3] *}

Biến `app` này là một "instance" của class `FastAPI`.

Đây sẽ là điểm cốt lõi để tạo ra tất cả API của bạn.

`app` này chính là điều được nhắc tới bởi `uvicorn` trong câu lệnh:

<div class="termy">

```console
$ uvicorn main:app --reload

import org.jspecify.annotations.Nullable;

/**
 * A GWT-only class only used by GWT emulations. It is used to consolidate the definitions of method
 * delegation to save code size.
 *
 * @author Hayward Chan
 */
final class ForwardingImmutableCollection<E> extends ImmutableCollection<E> {

  final transient Collection<E> delegate;

  ForwardingImmutableCollection(Collection<E> delegate) {
    this.delegate = delegate;