* object.
 *
 * <p><b>Comparison to {@code java.util.Optional} (JDK 8 and higher):</b> A new {@code Optional}
 * class was added for Java 8. The two classes are extremely similar, but incompatible (they cannot
 * share a common supertype). <i>All</i> known differences are listed either here or with the
 * relevant methods below.
 *
 * <ul>
 *   <li>This class is serializable; {@code java.util.Optional} is not.

 *       (such as by passing an invalid argument), use the utilities of the {@link Preconditions}
 *       class instead.
 *   <li>If checking an <i>impossible</i> condition (which <i>cannot</i> happen unless your own
 *       class or its <i>trusted</i> dependencies is badly broken), this is what ordinary Java
 *       assertions are for. Note that assertions are not enabled by default; they are essentially

		entry = &h.currentMinute
	case reqTimeMinute.Equal(h.lastFullMinute.statsTime):
		entry = &h.lastFullMinute
	default:
		// This request is too old, it should never happen, ignore it as we
		// cannot return an error.
		return
	}

	// Update stats
	if isSuccess {
		if entry.maxRttMs < rttMs {
			entry.maxRttMs = rttMs
		}
		entry.rttMsSum += rttMs
		entry.successRequestCount++
	} else {

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          notices within Derivative Works that You distribute, alongside
          or as an addendum to the NOTICE text from the Work, provided
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          notices within Derivative Works that You distribute, alongside
          or as an addendum to the NOTICE text from the Work, provided
          that such additional attribution notices cannot be construed
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      You may add Your own copyright statement to Your modifications and
      may provide additional or different license terms and conditions

          notices within Derivative Works that You distribute, alongside
          or as an addendum to the NOTICE text from the Work, provided
          that such additional attribution notices cannot be construed
          as modifying the License.

      You may add Your own copyright statement to Your modifications and
      may provide additional or different license terms and conditions

          notices within Derivative Works that You distribute, alongside
          or as an addendum to the NOTICE text from the Work, provided
          that such additional attribution notices cannot be construed
          as modifying the License.

      You may add Your own copyright statement to Your modifications and
      may provide additional or different license terms and conditions