/*
       * requireNonNull is safe because:
       *
       * - columnIterator.remove() succeeded, so it must have returned a value, so it must have been
       * initialized by next() -- which initializes rowEntry, too.
       *
       * - rowEntry isn't cleared except below. If it was cleared below, then either
       *   columnIterator.remove() would have failed above (if the user hasn't called next() since

      assertThrows(IllegalArgumentException.class, () -> LongMath.binomial(n, 0));
    }
  }


  @J2ktIncompatible // slow enough to cause flakiness
  @GwtIncompatible // far too slow
  public void testSqrtOfPerfectSquareAsDoubleIsPerfect() {
    // This takes just over a minute on my machine.
    for (long n = 0; n <= LongMath.FLOOR_SQRT_MAX_LONG; n++) {

	}
}

func TestRoundTrip(t *testing.T) {
	data := []byte("some file contents")

	var b bytes.Buffer
	tw := NewWriter(&b)
	hdr := &Header{
		Name:       "file.txt",
		Uid:        1 << 21, // Too big for 8 octal digits
		Size:       int64(len(data)),
		ModTime:    time.Now().Round(time.Second),
		PAXRecords: map[string]string{"uid": "2097152"},
		Format:     FormatPAX,
		Typeflag:   TypeReg,
	}

   *   <li>If there is any non-private constructor or non-private static factory method declared by
   *       {@code cls}, all non-private instance methods will be checked too using the instance
   *       created by invoking the constructor or static factory method.
   *   <li>If there is any non-private constructor or non-private static factory method declared by
   *       {@code cls}:

    assertThat((long) arraysDim1 * arraysDim2).isNotEqualTo((long) (arraysDim1 * arraysDim2));

    long[][] arrays = new long[arraysDim1][];
    // it's shared to avoid using too much memory in tests
    long[] sharedArray = new long[arraysDim2];
    Arrays.fill(arrays, sharedArray);

    try {
      Longs.concat(arrays);
      fail();
    } catch (IllegalArgumentException expected) {

    assertThat((long) arraysDim1 * arraysDim2).isNotEqualTo((long) (arraysDim1 * arraysDim2));

    short[][] arrays = new short[arraysDim1][];
    // it's shared to avoid using too much memory in tests
    short[] sharedArray = new short[arraysDim2];
    Arrays.fill(arrays, sharedArray);

    try {
      Shorts.concat(arrays);
      fail();
    } catch (IllegalArgumentException expected) {

			Volume: bucket,
			Name:   e.name,
			Versions: []FileInfo{
				{
					Volume: bucket,
					Name:   e.name,
					Mode:   uint32(os.ModeDir),
				},
			},
		}, nil
	}
	// Too small gains to reuse cache here.
	return getFileInfoVersions(e.metadata, bucket, e.name, true)
}

// metaCacheEntries is a slice of metacache entries.
type metaCacheEntries []metaCacheEntry

 * @author Bob Lee ({@code com.google.common.collect.MapMaker})
 * @author Doug Lea ({@code ConcurrentHashMap})
 */
@SuppressWarnings({
  "GoodTime", // lots of violations (nanosecond math)
  "nullness", // too much trouble for the payoff
})
@GwtCompatible
@NullUnmarked // TODO(cpovirk): Annotate for nullness.
final class LocalCache<K, V> extends AbstractMap<K, V> implements ConcurrentMap<K, V> {

  /*

   * as necessary when the method is expected to return (at the cost of hanging forever if there is
   * a bug in the class under test) but that we time out fairly promptly when the method is expected
   * to hang (possibly too quickly, but too-quick failures should be very unlikely, given that we
   * used to bail after 20ms during the expected-successful tests, and there we saw a failure rate

   * as necessary when the method is expected to return (at the cost of hanging forever if there is
   * a bug in the class under test) but that we time out fairly promptly when the method is expected
   * to hang (possibly too quickly, but too-quick failures should be very unlikely, given that we
   * used to bail after 20ms during the expected-successful tests, and there we saw a failure rate