}

  // A static mapping from an Enum type to its set of LockGraphNodes.
  private static final ConcurrentMap<
          Class<? extends Enum<?>>, Map<? extends Enum<?>, LockGraphNode>>
      lockGraphNodesPerType = new MapMaker().weakKeys().makeMap();

  /** Creates a {@code CycleDetectingLockFactory.WithExplicitOrdering<E>}. */
  public static <E extends Enum<E>> WithExplicitOrdering<E> newInstanceWithExplicitOrdering(

   * class's static initializer can fall back on a non-Unsafe version.
   */
  @SuppressWarnings("SunApi") // b/345822163
  @VisibleForTesting
  enum UnsafeByteArray implements LittleEndianBytes {
    // Do *not* change the order of these constants!
    UNSAFE_LITTLE_ENDIAN {
      @Override
      public long getLongLittleEndian(byte[] array, int offset) {

from collections.abc import Awaitable, Callable, Coroutine, Sequence
from enum import Enum
from typing import Annotated, Any, TypeVar

from annotated_doc import Doc
from fastapi import routing
from fastapi.datastructures import Default, DefaultPlaceholder
from fastapi.exception_handlers import (
    http_exception_handler,
    request_validation_exception_handler,
    websocket_request_validation_exception_handler,
)
from fastapi.exceptions import (

   * ordering, if Spliterator.ORDERED is not present).
   */
  @IgnoreJRERequirement // *should* be redundant with the annotation on SpliteratorTester
  private enum SpliteratorDecompositionStrategy {
    NO_SPLIT_FOR_EACH_REMAINING {
      @Override
      <E extends @Nullable Object> void forEach(
          GeneralSpliterator<E> spliterator, Consumer<? super E> consumer) {

    }
  }

  /**
   * Different ways of decomposing a Spliterator, all of which must produce the same elements (up to
   * ordering, if Spliterator.ORDERED is not present).
   */
  private enum SpliteratorDecompositionStrategy {
    NO_SPLIT_FOR_EACH_REMAINING {
      @Override
      <E extends @Nullable Object> void forEach(
          GeneralSpliterator<E> spliterator, Consumer<? super E> consumer) {

   * and values are the result of applying the provided mapping functions to the input elements. The
   * resulting implementation is specialized for enum key types. The returned map and its views will
   * iterate over keys in their enum definition order, not encounter order.
   *
   * <p>If the mapped keys contain duplicates, an {@code IllegalArgumentException} is thrown when

   * resulting implementation is specialized for enum key types. The returned map and its views will
   * iterate over keys in their enum definition order, not encounter order.
   *
   * <p>If the mapped keys contain duplicates, the values are merged using the specified merging
   * function.
   *
   * @since 21.0
   */
  public static <T extends @Nullable Object, K extends Enum<K>, V>

      if (newArg == null || Objects.equals(args.get(i), newArg)) {
        if (params.get(i).getType().getRawType().isEnum()) {
          continue; // Nothing better we can do if it's single-value enum
        }
        throw new ParameterHasNoDistinctValueException(params.get(i));
      }
      newArgs.set(i, newArg);
      tester.addEqualityGroup(createInstance(factory, newArgs));

  }

  boolean usesKeyReferences() {
    return keyStrength != Strength.STRONG;
  }

  boolean usesValueReferences() {
    return valueStrength != Strength.STRONG;
  }

  enum Strength {
    /*
     * TODO(kevinb): If we strongly reference the value and aren't loading, we needn't wrap the
     * value. This could save ~8 bytes per entry.
     */

    STRONG {
      @Override

    try {
      return state.closeables.whenClosedCountDown();
    } finally {
      reachabilityFence(this);
    }
  }

  /** The status of a {@link CloseableList}. */
  enum Status {
    /** The {@link CloseableList} has not been subsumed or closed. */
    OPEN,

    /**
     * The {@link CloseableList} has been subsumed into another. It may not be closed or subsumed