* kubeadm: improved RequiredIPVSKernelModulesAvailable warning message ([#74033](https://github.com/kubernetes/kubernetes/pull/74033), [@bart0sh](https://github.com/bart0sh))
* Add `nullable` support to CustomResourceDefinition OpenAPI validation schemata. ([#74804](https://github.com/kubernetes/kubernetes/pull/74804), [@sttts](https://github.com/sttts))

        }
    }

    /**
     * Execute a callable through the circuit breaker
     *
     * @param <T> return type
     * @param callable the callable to execute
     * @return the result
     * @throws Exception if execution fails or circuit is open
     */
    public <T> T call(Callable<T> callable) throws Exception {
        return call(callable, null);
    }

    /**

        assertDoesNotThrow(() -> {
            cache.getBuffer();
            cache.releaseBuffer(new byte[1024]);
        }, "All BufferCache interface methods should be callable");
    }

    @Test
    @DisplayName("getBuffer should return non-null byte array")
    void testGetBufferContract() {
        // Given
        byte[] expectedBuffer = new byte[1024];

    TestExecutor(MockExecutor mock) {
      super(mock);
    }

    @Override
    protected <T> Callable<T> wrapTask(Callable<T> callable) {
      return new WrappedCallable<T>(callable);
    }

    @Override
    protected Runnable wrapTask(Runnable command) {
      return new WrappedRunnable(command);
    }
  }

Entonces, una clase en Python también es un **callable**.

Entonces, en **FastAPI**, podrías usar una clase de Python como una dependencia.

Lo que **FastAPI** realmente comprueba es que sea un "callable" (función, clase o cualquier otra cosa) y los parámetros definidos.

    return schedule(callable(command), delay, unit);
  }

  @Override
  public <V> ListenableScheduledFuture<V> schedule(
      Callable<V> callable, long delay, TimeUnit unit) {
    Preconditions.checkNotNull(callable, "callable must not be null!");
    Preconditions.checkNotNull(unit, "unit must not be null!");
    ListenableFuture<V> delegateFuture = submit(callable);

    return schedule(callable(command), delay, unit);
  }

  @Override
  public <V> ListenableScheduledFuture<V> schedule(
      Callable<V> callable, long delay, TimeUnit unit) {
    Preconditions.checkNotNull(callable, "callable must not be null!");
    Preconditions.checkNotNull(unit, "unit must not be null!");
    ListenableFuture<V> delegateFuture = submit(callable);

        final Callable<Integer> testCallable = new Callable<Integer>() {
            public Integer call() throws Exception {
                CrawlingParameterUtil.setUrlQueue(q);
                controller.delayBeforeProcessing();
                return 0;
            }
        };

        // Callableタスクを複数生成
        final List<Callable<Integer>> tasks = new ArrayList<Callable<Integer>>();

    taskDone = false;
    Callable<Integer> task =
        new Callable<Integer>() {
          @Override
          public Integer call() {
            taskDone = true;
            return 6;
          }
        };
    Future<Integer> future =
        TestingExecutors.sameThreadScheduledExecutor().schedule(task, 10000, MILLISECONDS);
    assertTrue("Should run callable immediately", taskDone);

    taskDone = false;
    Callable<Integer> task =
        new Callable<Integer>() {
          @Override
          public Integer call() {
            taskDone = true;
            return 6;
          }
        };
    Future<Integer> future =
        TestingExecutors.sameThreadScheduledExecutor().schedule(task, 10000, MILLISECONDS);
    assertTrue("Should run callable immediately", taskDone);