* the event source has already been closed or canceled.
   */
  fun cancel()

  fun interface Factory {
    /**
     * Creates a new event source and immediately returns it. Creating an event source initiates an
     * asynchronous process to connect the socket. Once that succeeds or fails, `listener` will be
     * notified. The caller must cancel the returned event source when it is no longer in use.
     */
    fun newEventSource(

  }

  @Override
  public void addListener(Runnable listener, Executor executor) {
    delegate.addListener(listener, executor);
  }

  @Override
  public boolean cancel(boolean mayInterruptIfRunning) {
    return delegate.cancel(mayInterruptIfRunning);
  }

  @Override
  public boolean isCancelled() {
    return delegate.isCancelled();
  }

  @Override
  public boolean isDone() {

	}
	endpointLocal, err := NewEndpoint("http://localhost:9012")
	if err != nil {
		t.Fatalf("unexpected error %v", err)
	}
	endpointLocal.IsLocal = true

	ctx, cancel := context.WithCancel(t.Context())
	defer cancel()
	err = initGlobalLockGrid(ctx, []PoolEndpoints{{Endpoints: Endpoints{endpoint, endpointLocal}}})
	if err != nil {
		t.Fatal(err)
	}

	lkClient := newlockRESTClient(endpoint)

      @Override
      @SuppressWarnings("Interruption") // We are propagating an interrupt from a caller.
      public void cancel(boolean mayInterruptIfRunning) {
        /*
         * Lock to ensure that a task cannot be rescheduled while a cancel is ongoing.
         *
         * In theory, cancel() could execute arbitrary listeners -- bad to do while holding a lock.

    } finally {
      latch.countDown();
    }
  }

  /**
   * Tests that a canceled future throws a cancellation exception.
   *
   * <p>This method checks the cancel, isCancelled, and isDone methods.
   */
  public void testCanceledFutureThrowsCancellation() throws Exception {

    assertFalse(future.isDone());
    assertFalse(future.isCancelled());

     * Sets the number of request credits.
     *
     * @param credits the number of credits to set
     */
    void setRequestCredits(int credits);

    /**
     * Checks if this is a cancel request.
     *
     * @return whether this is a cancel request
     */
    boolean isCancel();

    /**
     * Gets the next request in the chain.
     *
     * @return chained request
     */
    Request getNext();

    /**

    } finally {
      latch.countDown();
    }
  }

  /**
   * Tests that a canceled future throws a cancellation exception.
   *
   * <p>This method checks the cancel, isCancelled, and isDone methods.
   */
  public void testCanceledFutureThrowsCancellation() throws Exception {

    assertFalse(future.isDone());
    assertFalse(future.isCancelled());

    /**
     * Gets the size of this message.
     *
     * @return the size of this message
     */
    int size();

    /**
     * Creates a cancel request for this request.
     *
     * @return create cancel request
     */
    CommonServerMessageBlockRequest createCancel();

    /**
     * Checks if chaining is allowed with the next request.
     *

	}

	// Start profiling on remote servers.
	for _, profiler := range profiles {
		// Limit start time to max 10s.
		ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
		globalNotificationSys.StartProfiling(ctx, profiler)
		// StartProfiling blocks, so we can cancel now.
		cancel()

		// Start profiling locally as well.
		prof, err := startProfiler(profiler)
		if err == nil {

          : getUninterruptibly(future, timeoutDuration, timeoutUnit);
    } catch (InterruptedException e) {
      future.cancel(true);
      throw e;
    } catch (ExecutionException e) {
      throw throwCause(e, true /* combineStackTraces */);
    } catch (TimeoutException e) {
      future.cancel(true);
      throw new UncheckedTimeoutException(e);
    }
  }

  @CanIgnoreReturnValue
  @Override