QUICConfig:      &quic.Config{},
		}
	}
	closeFn := func(conn *http3.RoundTripper) func() {
		return func() {
			_ = conn.Close()
		}
	}
	noCloseFn := func() {}

	if cfg.newConnectionPerRequest {
		// Create a new transport (i.e. connection) for each request.
		return func() (http.RoundTripper, func(), error) {
			conn := newConn()
			return conn, closeFn(conn), nil
		}, noCloseFn
	}

 *
 * <pre>{@code
 * Closer closer = Closer.create();
 * try {
 *   InputStream in = closer.register(openInputStream());
 *   OutputStream out = closer.register(openOutputStream());
 *   // do stuff
 * } catch (Throwable e) {
 *   // ensure that any checked exception types other than IOException that could be thrown are
 *   // provided here, e.g. throw closer.rethrow(e, CheckedException.class);

 *
 * <pre>{@code
 * Closer closer = Closer.create();
 * try {
 *   InputStream in = closer.register(openInputStream());
 *   OutputStream out = closer.register(openOutputStream());
 *   // do stuff
 * } catch (Throwable e) {
 *   // ensure that any checked exception types other than IOException that could be thrown are
 *   // provided here, e.g. throw closer.rethrow(e, CheckedException.class);

	if !waitCondition(t, func() bool {
		rows.closemu.RLock()
		defer rows.closemu.RUnlock()
		return rows.closed
	}) {
		t.Fatal("failed to close rows")
	}
}

// TestQueryContextWait ensures that rows and all internal statements are closed when
// a query context is closed during execution.
func TestQueryContextWait(t *testing.T) {
	db := newTestDB(t, "people")
	defer closeDB(t, db)
	prepares0 := numPrepares(t, db)

    Closer closer = new Closer(suppressor);

    TestCloseable c1 = closer.register(TestCloseable.normal());
    TestCloseable c2 = closer.register(TestCloseable.normal());

    IOException exception = new IOException();

    try {
      try {
        throw exception;
      } catch (Throwable e) {
        throw closer.rethrow(e);
      } finally {
        closer.close();
      }

	// wg counts the number of outstanding HTTP requests on this server.
	// Close blocks until all requests are finished.
	wg sync.WaitGroup

	mu     sync.Mutex // guards closed and conns
	closed bool
	conns  map[net.Conn]http.ConnState // except terminal states

	// client is configured for use with the server.
	// Its transport is automatically closed when Close is called.
	client *http.Client
}

	// and exclusively during close.
	//
	// closemu guards lasterr and closed.
	closemu sync.RWMutex
	lasterr error // non-nil only if closed is true
	closed  bool

	// closemuScanHold is whether the previous call to Scan kept closemu RLock'ed
	// without unlocking it. It does that when the user passes a *RawBytes scan

 *
 * <pre>{@code
 * FluentFuture<UserName> userName =
 *     ClosingFuture.submit(
 *             closer -> closer.eventuallyClose(database.newTransaction(), closingExecutor),
 *             executor)
 *         .transformAsync((closer, transaction) -> transaction.queryClosingFuture("..."), executor)
 *         .transform((closer, result) -> result.get("userName"), directExecutor())

	if err == nil {
		panic("nil error")
	}
	pc.broken = true
	if pc.closed == nil {
		pc.closed = err
		pc.t.decConnsPerHost(pc.cacheKey)
		// Close HTTP/1 (pc.alt == nil) connection.
		// HTTP/2 closes its connection itself.
		if pc.alt == nil {
			if err != errCallerOwnsConn {
				pc.conn.Close()
			}
			close(pc.closech)
		}
	}
	pc.mutateHeaderFunc = nil
}

        1 * backingCache.close()
        0 * _._
    }

    def "closes cache when closed"() {
        given:
        cacheOpened()

        when:
        cache.finishWork()

        then:
        1 * fileAccess.writeFile(!null) >> { Runnable action -> action.run() }
        1 * backingCache.close()
        0 * _._
    }