public void testKeyType() {
    EnumHashBiMap<Currency, String> bimap = EnumHashBiMap.create(Currency.class);
    assertEquals(Currency.class, bimap.keyType());
  }

  public void testEntrySet() {
    // Bug 3168290
    Map<Currency, String> map =
        ImmutableMap.of(
            Currency.DOLLAR, "dollar",
            Currency.PESO, "peso",
            Currency.FRANC, "franc");

    // This is somewhat annoying, but turns out to be very fast in practice. Alternatively, we could
    // drop the contract on the method that enforces this queue like behavior since depending on it
    // is likely to be a bug anyway.

    // N.B. All writes to the list and the next pointers must have happened before the above
    // synchronized block, so we can iterate the list without the lock held here.

Já aconteceu várias vezes de haver PRs com 3, 5 ou mais aprovações, provavelmente porque a descrição é atraente, mas quando eu verifico os PRs, eles estão quebrados, têm um bug, ou não resolvem o problema que afirmam resolver. 😅

Por isso, é realmente importante que você leia e execute o código, e me avise nos comentários que você fez isso. 🤓

///

          if (nanoTime >= waitUntil) return@withLock null
          val editCountBefore = editCount
          yieldUntil { nanoTime >= waitUntil || editCount > editCountBefore }
        }
        // TODO report compiler bug
        TODO("Can't get here")
      }
    }

    override fun put(element: T) {
      taskRunner.withLock {
        delegate.put(element)
        editCount++
      }
    }

// Some Android 5.0.x Samsung devices have bugs in JDK reflection APIs that cause
// getDeclaredField to throw a NoSuchFieldException when the field is definitely there.
// Since this class only needs CAS on one field, we can avoid this bug by extending AtomicReference
// instead of using an AtomicReferenceFieldUpdater. This reference stores Thread instances
// and DONE/INTERRUPTED - they have a common ancestor of Runnable.

  }

  public void testBuilder_presize_negative() {
    assertThrows(IllegalArgumentException.class, () -> ImmutableDoubleArray.builder(-1));
  }

  /**
   * If there's a bug in builder growth, we wouldn't know how to expose it. So, brute force the hell
   * out of it for a while and see what happens.
   */
  public void testBuilder_bruteForce() {

          // I regard highly unlikely that both the little endianness tests above and this one
          // passes, and there is still a little endianness bug lurking around.
        }
      }

      Control control = new Control();
      Hasher controlSink = control.newHasher(1024);

      Iterable<Hasher> sinksAndControl =

        classRepository.each {name, ClassMetaData metaData ->
            linkRepository.put(name, new ClassLinkMetaData(metaData))
        }

        // workaround to IBM JDK bug
        def createDslDocModelClosure = this.&createDslDocModel.curry(classDocbookDirectory.get().asFile, mainDocbookTemplate, classRepository)

        def doc = mainDocbookTemplate
        use(BuildableDOMCategory) {

    hashed_password = hashed_password,
)
```

/// warning | 警告

辅助的附加函数只是为了演示可能的数据流，但它们显然不能提供任何真正的安全机制。

///

## 减少重复

**FastAPI** 的核心思想就是减少代码重复。

代码重复会导致 bug、安全问题、代码失步等问题（更新了某个位置的代码，但没有同步更新其它位置的代码）。

上面的这些模型共享了大量数据，拥有重复的属性名和类型。

FastAPI 可以做得更好。

声明 `UserBase` 模型作为其它模型的基类。然后，用该类衍生出继承其属性（类型声明、验证等）的子类。

所有数据转换、校验、文档等功能仍将正常运行。

* maximize the chance of your changes being accepted
* work on the Gradle code base
* get help if you encounter trouble

## Before you start

Before starting to work on a feature or a bug fix, please open an issue to discuss the use case or bug with us, or post a comment in the relevant issue. 
This can save everyone a lot of time and frustration.

For any non-trivial change, we need to be able to answer these questions: