O FastAPI saberá que o valor de `q` não é obrigatório por causa do valor padrão `= None`.

O `Union` em `Union[str, None]` não é utilizado pelo FastAPI, mas permite ao seu editor de texto lhe dar um suporte melhor e detectar erros.

///

## Sem o Pydantic

   * @param executor the executor to run the listener in
   * @throws RejectedExecutionException if we tried to execute the listener immediately but the
   *     executor rejected it.
   */
  void addListener(Runnable listener, Executor executor);

          else -> addresses
        }

      for (inetAddress in orderedAddresses) {
        mutableInetSocketAddresses += InetSocketAddress(inetAddress, socketPort)
      }
    }
  }

  /** A set of selected Routes. */
  class Selection(
    val routes: List<Route>,
  ) {
    private var nextRouteIndex = 0

    operator fun hasNext(): Boolean = nextRouteIndex < routes.size

    operator fun next(): Route {

- Fix: the volume is not detached after the pod and PVC objects are deleted ([#117358](https://github.com/kubernetes/kubernetes/pull/117358), [@cvvz](https://github.com/cvvz)) [SIG Storage]

   * #waitersField}.
   */
  private final @Nullable Waiter gasWaiters(Waiter update) {
    return ATOMIC_HELPER.gasWaiters(this, update);
  }

  /**
   * Marks the given node as 'deleted' (null waiter) and then scans the list to unlink all deleted
   * nodes. This is an O(n) operation in the common case (and O(n^2) in the worst), but we are saved
   * by two things.
   *
   * <ul>

func TestGetFileInfoVersions(t *testing.T) {
	basefi := FileInfo{
		Volume:           "volume",
		Name:             "object-name",
		VersionID:        "756100c6-b393-4981-928a-d49bbc164741",
		IsLatest:         true,
		Deleted:          false,
		TransitionStatus: "",
		DataDir:          "bffea160-ca7f-465f-98bc-9b4f1c3ba1ef",
		XLV1:             false,
		ModTime:          time.Now().UTC(),
		Size:             0,
		Mode:             0,

 *
 * <p>On different platforms AbstractFuture uses different strategies for its core synchronization
 * primitives. The strategies are all implemented as subtypes of AtomicHelper and the strategy is
 * selected in the static initializer of AbstractFuture. This is convenient and performant but
 * introduces some testing difficulties. This test exercises the fallback strategies.
 *

            this.successRate = successRate;
        }

        @Override
        public String toString() {
            return String.format("CircuitBreaker[%s] State=%s, Calls=%d, Success=%.2f%%, Rejected=%d", name, state, totalCalls,
                    successRate * 100, rejectedCalls);
        }
    }

    /**
     * Exception thrown when circuit breaker is open
     */

     */
    public boolean isUpdated() {
        return newInputs != null && newOutput != null;
    }

    /**
     * Checks whether this mapping item is marked for deletion.
     * An item is considered deleted if it has updates pending and the new inputs array is empty.
     *
     * @return true if the item is marked for deletion
     */
    public boolean isDeleted() {
        return isUpdated() && newInputs.length == 0;

    } else {
      checkArgument(keyEntry == ABSENT, "Key already present: %s", key);
    }

    // insertion point for new entry is after predecessor
    // note predecessor must still be a valid entry: either we deleted an entry that was *not*
    // predecessor, or we didn't delete anything

    ensureCapacity(size + 1);
    keys[size] = key;
    values[size] = value;

    insertIntoTableKToV(size, keyHash);