* Double#valueOf}.
   */
  private static @Nullable Double referenceTryParse(String input) {
    if (input.trim().length() < input.length()) {
      return null;
    }
    try {
      return Double.valueOf(input);
    } catch (NumberFormatException e) {
      return null;
    }
  }

  @GwtIncompatible // Doubles.tryParse
  private static void checkTryParse(String input) {

    new IteratorTester<E>(
        Platform.collectionIteratorTesterNumIterations(), features, elements, knownOrder) {
      @Override
      protected Iterator<E> newTargetIterator() {
        resetCollection();
        return collection.iterator();
      }

      @Override
      protected void verify(List<E> elements) {
        expectContents(elements);
      }
    }.test();
  }

        SynonymItem item1 = new SynonymItem(1, new String[] { "a" }, new String[] { "x" });

        // Set to null
        item1.setNewInputs(null);
        item1.setNewOutputs(null);

        // Should return null, not crash
        assertNull(item1.getNewInputs());
        assertNull(item1.getNewOutputs());
    }

    }

    @Override
    public void close() {
        if (closed.compareAndSet(false, true)) {
            updater.interrupt();
        }
    }

    public TransferListener getDelegate() {
        return delegate;
    }

    private void feedConsumer() {
        final ArrayList<Exchange> batch = new ArrayList<>(batchMaxSize);
        try {
            while (true) {
                batch.clear();

              return@Interceptor chain.proceed(chain.request())
            } catch (e: InterruptedException) {
              throw InterruptedIOException()
            }
          },
        ).addNetworkInterceptor(
          Interceptor { chain: Interceptor.Chain ->
            try {
              Thread.sleep(networkInterceptorDelay)
              return@Interceptor chain.proceed(chain.request())

        val parallelizationMethod =
            when (testCoverage.os) {
                Os.LINUX -> ParallelizationMethod.TestDistribution
                else -> ParallelizationMethod.None
            }

        return FunctionalTest(
            model,
            testCoverage.getBucketUuid(model, bucketIndex),
            "${testCoverage.asName()} ($startInclusive <= gradle <$endExclusive)",

요약하면, `stanleyjobsox`와 `stanleyjobson`을 비교하는 데 걸리는 시간은 `johndoe`와 `stanleyjobson`을 비교하는 데 걸리는 시간과 같아집니다. 비밀번호도 마찬가지입니다.

이렇게 애플리케이션 코드에서 `secrets.compare_digest()`를 사용하면, 이러한 범위의 보안 공격 전반에 대해 안전해집니다.

### 오류 반환하기 { #return-the-error }

자격 증명이 올바르지 않다고 판단되면, 상태 코드 401(자격 증명이 제공되지 않았을 때와 동일)을 사용하는 `HTTPException`을 반환하고 브라우저가 로그인 프롬프트를 다시 표시하도록 `WWW-Authenticate` 헤더를 추가하세요:

          @Override
          public Iterator<V> iterator() {
            checkState(!calledIteratorAlready);
            calledIteratorAlready = true;
            return Iterators.forArray(v3());
          }
        };

    multimap().putAll(k3(), iterable);
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutAllPropagatesToGet() {

	StatVol(ctx context.Context, volume string) (vol VolInfo, err error)
	DeleteVol(ctx context.Context, volume string, forceDelete bool) (err error)

	// WalkDir will walk a directory on disk and return a metacache stream on wr.
	WalkDir(ctx context.Context, opts WalkDirOptions, wr io.Writer) error

	// Metadata operations

    assertThat(nextEvent()).isEqualTo(Closed(code, reason))
  }

  fun assertExhausted() {
    assertThat(events).isEmpty()
  }

  fun assertOpen(): WebSocket {
    val event = nextEvent() as Open
    return event.webSocket
  }

  fun assertFailure(t: Throwable?) {
    val event = nextEvent() as Failure
    assertThat(event.response).isNull()
    assertThat(event.t).isSameInstanceAs(t)
  }