* {@code key} (or zero, if there is none) is passed as the first argument to {@code
   * accumulatorFunction}, and {@code x} is passed as the second argument.
   *
   * @since 21.0
   */
  @CanIgnoreReturnValue
  public long accumulateAndGet(K key, long x, LongBinaryOperator accumulatorFunction) {
    checkNotNull(accumulatorFunction);

            long initialActive = bufferManager.getActiveRegions();

            assertTrue(initialAllocated >= 2, "Should have allocated at least 2 regions");
            assertTrue(initialActive >= 2, "Should have at least 2 active regions");

            // Test buffer release and reuse
            bufferManager.releaseSendRegion(sendRegion);
            bufferManager.releaseReceiveRegion(recvRegion);

    void encodeCopiesAndReportsSize(byte[] src, int off, int len, int dstIndex) {
        Encodable enc = new ByteEncodable(src, off, len);

        // Destination has guard space to verify non-overwritten regions.
        byte[] dst = new byte[dstIndex + len + 5];
        Arrays.fill(dst, (byte) 0x55);

        // Act
        int written = enc.encode(dst, dstIndex);

* `datetime.time`:
    * 파이썬의 `datetime.time`.
    * 요청과 응답에서 `14:23:55.003`와 같은 ISO 8601 형식의 `str`로 표현됩니다.
* `datetime.timedelta`:
    * 파이썬의 `datetime.timedelta`.
    * 요청과 응답에서 전체 초(seconds)의 `float`로 표현됩니다.
    * Pydantic은 "ISO 8601 시차 인코딩"으로 표현하는 것 또한 허용합니다. <a href="https://docs.pydantic.dev/latest/concepts/serialization/#json_encoders" class="external-link" target="_blank">더 많은 정보는 이 문서에서 확인하십시오.</a>.
* `frozenset`:

		{"driver.Valuer equal", ModifyAt{Time: now, Valid: true}, ModifyAt{Time: now, Valid: true}, true},
		{"driver.Valuer not equal", ModifyAt{Time: now, Valid: true}, ModifyAt{Time: now.Add(time.Second), Valid: true}, false},
		{"driver.Valuer equal (ptr to nil ptr)", (*ModifyAt)(nil), &ModifyAt{}, false},
	}
	for _, test := range assertEqualTests {
		t.Run(test.name, func(t *testing.T) {

func ifModifiedSince(objTime time.Time, givenTime time.Time) bool {
	// The Date-Modified header truncates sub-second precision, so
	// use mtime < t+1s instead of mtime <= t to check for unmodified.
	return !objTime.Before(givenTime.Add(1 * time.Second))
}

// canonicalizeETag returns ETag with leading and trailing double-quotes removed,
// if any present

	// This goroutine owns the cache.
	var saverWg sync.WaitGroup
	saverWg.Add(1)
	go func() {
		// Add jitter to the update time so multiple sets don't sync up.
		updateTime := 30*time.Second + time.Duration(float64(10*time.Second)*rand.Float64())
		t := time.NewTicker(updateTime)
		defer t.Stop()
		defer saverWg.Done()
		var lastSave time.Time

		for {
			select {
			case <-t.C:

        assertNotNull(newStackTrace);
    }

    public void test_multipleInstances() {
        // Test that multiple instances are independent
        String message1 = "First exception";
        String message2 = "Second exception";

        UnsupportedSearchException exception1 = new UnsupportedSearchException(message1);
        UnsupportedSearchException exception2 = new UnsupportedSearchException(message2);

  /**
   * @param c the number of compression rounds (must be positive)
   * @param d the number of finalization rounds (must be positive)
   * @param k0 the first half of the key
   * @param k1 the second half of the key
   */
  SipHashFunction(int c, int d, long k0, long k1) {
    checkArgument(
        c > 0, "The number of SipRound iterations (c=%s) during Compression must be positive.", c);
    checkArgument(

        byte[] data1 = new byte[] { 0x01, 0x02, 0x03, 0x04 };
        digest.update(data1, 0, data1.length);
        byte[] result1 = digest.digest();
        assertNotNull(result1);

        // Second cycle
        byte[] data2 = new byte[] { 0x05, 0x06, 0x07, 0x08 };
        digest.update(data2, 0, data2.length);
        byte[] result2 = digest.digest();
        assertNotNull(result2);