## Context Managers { #context-managers }

### What are "Context Managers" { #what-are-context-managers }

classes in it, e.g. in a `List[Item]`), the Pydantic model class(es) will be a different one (the "cloned" one). So, an object that is a subclass won't simply pass the validation and returned as-is, because it is no longer a sub-class of the cloned `response_model`. Instead, a new Pydantic model object will be created with the contents of the returned object. So, it will be a new object (made with the data from the returned one), and will be filtered by the cloned `response_model`, containing only the...

                default -> throw new IllegalStateException("invalid item: " + item.getClass());
            };
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (o == null || getClass() != o.getClass()) {
                return false;
            }

      extends View<K, V, Entry<V, K>> {
    InverseEntrySet(HashBiMap<K, V> biMap) {
      super(biMap);
    }

    @Override
    public boolean contains(@Nullable Object o) {
      if (o instanceof Entry) {
        Entry<?, ?> e = (Entry<?, ?>) o;
        Object v = e.getKey();
        Object k = e.getValue();

 *         .filter(Client::isActiveInLastMonth)
 *         .transform(Object::toString)
 *         .limit(10)
 *         .toList();
 * }
 *
 * The approximate stream equivalent is:
 *
 * {@snippet :
 * List<String> results =
 *     database.getClientList()
 *         .stream()
 *         .filter(Client::isActiveInLastMonth)
 *         .map(Object::toString)
 *         .limit(10)

   * @throws IllegalArgumentException if {@code expectedSize} is negative
   */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      CompactHashMap<K, V> createWithExpectedSize(int expectedSize) {
    return new CompactHashMap<>(expectedSize);
  }

  private static final Object NOT_FOUND = new Object();

  /**
   * Maximum allowed false positive probability of detecting a hash flooding attack given random

 *         .filter(Client::isActiveInLastMonth)
 *         .transform(Object::toString)
 *         .limit(10)
 *         .toList();
 * }
 *
 * The approximate stream equivalent is:
 *
 * {@snippet :
 * List<String> results =
 *     database.getClientList()
 *         .stream()
 *         .filter(Client::isActiveInLastMonth)
 *         .map(Object::toString)
 *         .limit(10)
 *         .collect(Collectors.toList());

  private static final class TimedTakeQueue {
    final BlockingQueue<String> queue;
    final Completion completed;

    /**
     * Creates a {@link EnableReads} which insert an element for a {@code take} to receive in {@code
     * countdownInMillis}.
     */
    static TimedTakeQueue createWithDelay(long countdownInMillis) {
      return new TimedTakeQueue(countdownInMillis);
    }

    private final Object domainsLock = new Object();

    private final Map<String, CacheEntry<DfsReferralDataInternal>> dcCache = new HashMap<>();
    private final Object dcLock = new Object();

    private CacheEntry<DfsReferralDataInternal> referrals = null;
    private final Object referralsLock = new Object();

    /**
     * Constructs a DFS resolver implementation
     *

"l","closest","index","prevAll","add","addBack","parents","parentsUntil","nextAll","nextUntil","prevUntil","contentDocument","content","reverse","rnothtmlwhite","Identity","v","Thrower","ex","adoptValue","resolve","reject","noValue","method","promise","fail","then","Callbacks","object","_","flag","firing","memory","fired","locked","list","queue","firingIndex","fire","once","stopOnFalse","remove","disable","lock","fireWith","Deferred","func","tuples","state","always","deferred","catch","pipe","fn...