var mu sync.Mutex
	var wg sync.WaitGroup
	var errs []error
	allAtEOF := true
	var inputs []chan metaCacheEntry
	mu.Lock()
	// Ask all sets and merge entries.
	listCtx, cancelList := context.WithCancel(ctx)
	defer cancelList()
	for _, pool := range z.serverPools {
		for _, set := range pool.sets {
			wg.Add(1)
			innerResults := make(chan metaCacheEntry, 100)
			inputs = append(inputs, innerResults)

 *
 * This class supports [asynchronous canceling][cancel]. This is intended to have the smallest
 * blast radius possible. If an HTTP/2 stream is active, canceling will cancel that stream but not
 * the other streams sharing its connection. But if the TLS handshake is still in progress then
 * canceling may break the entire connection.
 */
class RealCall(
  val client: OkHttpClient,

}

// LoadEncryptionConfig parses and validates the encryption config specified by filepath.
// It may launch multiple go routines whose lifecycle is controlled by ctx.
// In case of an error, the caller is responsible for canceling ctx to clean up any go routines that may have been launched.
// If reload is true, or KMS v2 plugins are used with no KMS v1 plugins, the returned slice of health checkers will always be of length 1.

// context's Done channel is closed when the returned cancel function is called
// or when the parent context's Done channel is closed, whichever happens first.
//
// Canceling this context releases resources associated with it, so code should
// call cancel as soon as the operations running in this [Context] complete.
func WithCancel(parent Context) (ctx Context, cancel CancelFunc) {

	}
	if got := Cause(ccc); got != Canceled {
		t.Errorf("after CancelCauseFunc Cause(ccc) = %v, want %v", got, Canceled)
	}

	// Test that if we associate a custom context with a child,
	// then canceling the custom context cancels the child.
	ccc = &customCauseContext{
		done: make(chan struct{}),
	}
	ctx, cancelFunc := WithCancel(ccc)
	ccc.setCancelChild(cancelFunc)
	ccc.cancel()

	// Handle handles the Record.
	// It will only be called when Enabled returns true.
	// The Context argument is as for Enabled.
	// It is present solely to provide Handlers access to the context's values.
	// Canceling the context should not affect record processing.
	// (Among other things, log messages may be necessary to debug a
	// cancellation-related problem.)
	//
	// Handle methods that produce output should observe the following rules:

 *  Fix: Don't crash with a `InaccessibleObjectException` when detecting the platform trust manager
    on Java 17+.
 *  Fix: Don't crash if a cookie's value is a lone double quote character.
 *  Fix: Don't crash when canceling an event source created by `EventSources.processResponse()`.
 *  New: `Cache` now has a public constructor that takes an [okio.FileSystem]. This should make it
    possible to implement decorators for cache encryption or compression.

  return tensorflow::unwrap(cancellation_manager)->IsCancelled();
}

bool TFE_CancellationManagerIsCancelling(
    TFE_CancellationManager* cancellation_manager) {
  return tensorflow::unwrap(cancellation_manager)->IsCancelling();
}

TFE_CancellationToken TFE_CancellationManagerGetToken(
    TFE_CancellationManager* cancellation_manager) {
  return tensorflow::unwrap(cancellation_manager)->get_cancellation_token();
}

	}

	if z.SinglePool() {
		return errInvalidArgument
	}

	z.poolMetaMutex.Lock()
	defer z.poolMetaMutex.Unlock()

	fn := z.decommissionCancelers[idx]
	if fn == nil {
		// canceling a decommission before it started return an error.
		return errDecommissionNotStarted
	}

	defer fn() // cancel any active thread.

	if z.poolMeta.DecommissionCancel(idx) {

	}

	notAcceptingNewRequestCh := s.lifecycleSignals.NotAcceptingNewRequest
	drainedCh := s.lifecycleSignals.InFlightRequestsDrained
	// Canceling the parent context does not immediately cancel the HTTP server.
	// We only inherit context values here and deal with cancellation ourselves.
	stopHTTPServerCtx, stopHTTPServer := context.WithCancelCause(context.WithoutCancel(ctx))