*/
    public interface RequestListener {

        /**
         * Called when a request starts.
         *
         * @param client the fault-tolerant client
         * @param request the request data
         */
        void onRequestStart(FaultTolerantClient client, RequestData request);

        /**
         * Called before each request attempt.
         *
         * @param client the fault-tolerant client

          }
          else -> null
        }
      }

    // If the call's connection wasn't released, reuse it. We don't call connectionAcquired() here
    // because we already acquired it.
    if (connectionUser.candidateConnection() != null) {
      check(toClose == null)
      return ReusePlan(candidate)
    }

    // The call's connection was released.
    toClose?.closeQuietly()

     * We mock a simple 200 OK response to test the handshake is called.
     * @throws IOException
     */
    @Test
    void testGettersTriggerHandshake() throws IOException {
        // Arrange
        // Spy on the connection to verify handshake() is called
        NtlmHttpURLConnection spiedConnection = spy(ntlmConnection);
        doNothing().when(spiedConnection).connect();

            }
        };
        ComponentUtil.register(factory, "webApiManagerFactory");

        // Execute
        webApiFilter.doFilter(request, response, chain);

        // Verify manager was called and chain was not called directly
        assertTrue(managerCalled.get());
        assertFalse(chainCalled.get());
    }

    // Test doFilter with ServletRequest and ServletResponse (not HTTP variants)

        // Verify that the super constructor was called with the correct arguments
        // Note: Mockito cannot directly verify super constructor calls.
        // We assume if the object is created, the super constructor was called.
        // We can verify the state of the object after construction.

        // Verify ptype and flags are set correctly

        // Verify listener not called yet
        assertFalse(listener.wasShutdownCalled());

        // Call shutdown
        scriptExecutor.shutdown();

        // Verify listener was called
        assertTrue(listener.wasShutdownCalled());
    }

    public void test_shutdown_withoutListener() {
        // Call shutdown without setting listener
        try {

     *     {@link #whenAllComplete(Iterable)} or {@link #whenAllComplete(Iterable)}
     * @throws IllegalStateException if called outside of a call to {@link
     *     CombiningCallable#call(DeferredCloser, Peeker)} or {@link
     *     AsyncCombiningCallable#call(DeferredCloser, Peeker)}
     */
    @ParametricNullness
    public final <D extends @Nullable Object> D getDone(ClosingFuture<D> closingFuture)

    assertEquals(1, listenerLatch.getCount());
    assertFalse(task.isDone());
    assertFalse(task.isCancelled());

    // Finish the task by unblocking the task latch.  Then wait for the
    // listener to be called by blocking on the listener latch.
    taskLatch.countDown();
    assertEquals(25, task.get().intValue());
    assertTrue(listenerLatch.await(5, SECONDS));
    assertTrue(task.isDone());

 * </ol>
 * <p>
 * Implementations of this interface will be discovered through the Java ServiceLoader mechanism
 * and will be called in sequence during model building.
 * <p>
 * Example usage:
 * <pre>
 * public class CustomModelTransformer implements ModelTransformer {

func (e *lockedLastMinuteLatency) add(value time.Duration) {
	e.addSize(value, 0)
}

// addSize will add a duration and size.
func (e *lockedLastMinuteLatency) addSize(value time.Duration, sz int64) {
	// alloc on every call, so we have a clean entry to swap in.
	t := time.Now().Unix()
	e.init.Do(func() {
		e.cached.Store(&AccElem{})
		atomic.StoreInt64(&e.cachedSec, t)
	})
	acc := e.cached.Load()