return (totalLoadCount == 0) ? 0.0 : (double) totalLoadTime / totalLoadCount;
  }

  /**
   * Returns the number of times an entry has been evicted. This count does not include manual
   * {@linkplain Cache#invalidate invalidations}.
   */
  public long evictionCount() {
    return evictionCount;
  }

  /**
   * Returns a new {@code CacheStats} representing the difference between this {@code CacheStats}

     * the key entry's prev or next pointer might point to the dead value entry, and when we
     * put the new entry in the key entry's position in iteration order, it might invalidate
     * the linked list.
     */

    if (oldEntryForValue != null) {
      delete(oldEntryForValue);
    }

    if (oldEntryForKey != null) {
      delete(oldEntryForKey);
    }

}

// AssignMigrateTarget assigns a target
// which will eventually replace the current target.
func (h *Target) AssignMigrateTarget(migrateTgt *Target) {
	h.migrateTarget = migrateTgt
}

// Init validate and initialize the http target
func (h *Target) Init(ctx context.Context) (err error) {
	if h.config.QueueDir != "" {
		return h.initQueueOnce.DoWithContext(ctx, h.initDiskStore)
	}

			return nil, nil, fmt.Errorf("xlMetaV2.Load version(%d), CRC mismatch, want 0x%x, got 0x%x", minor, crc, got)
		}
	} else {
		return nil, nil, err
	}
	data = buf
	if data.validate() != nil {
		data.repair()
	}

	return meta, data, nil
}

type xlMetaV2ShallowVersion struct {
	header xlMetaV2VersionHeader
	meta   []byte
}

    private PathByteSource(Path path, OpenOption... options) {
      this.path = checkNotNull(path);
      this.options = options.clone();
      this.followLinks = followLinks(this.options);
      // TODO(cgdecker): validate the provided options... for example, just WRITE seems wrong
    }

    private static boolean followLinks(OpenOption[] options) {
      for (OpenOption option : options) {
        if (option == NOFOLLOW_LINKS) {

    private PathByteSource(Path path, OpenOption... options) {
      this.path = checkNotNull(path);
      this.options = options.clone();
      this.followLinks = followLinks(this.options);
      // TODO(cgdecker): validate the provided options... for example, just WRITE seems wrong
    }

    private static boolean followLinks(OpenOption[] options) {
      for (OpenOption option : options) {
        if (option == NOFOLLOW_LINKS) {

		return entries, err
	}

	// Marker points to before the prefix, just ignore it.
	if o.Marker < o.Prefix {
		o.Marker = ""
	}

	// Marker is set validate pre-condition.
	if o.Marker != "" && o.Prefix != "" {
		// Marker not common with prefix is not implemented. Send an empty response
		if !HasPrefix(o.Marker, o.Prefix) {
			return entries, io.EOF
		}
	}

      Map<R, Map<C, V>> backingMap, Supplier<? extends Map<C, V>> factory) {
    checkArgument(backingMap.isEmpty());
    checkNotNull(factory);
    // TODO(jlevy): Wrap factory to validate that the supplied maps are empty?
    return new StandardTable<>(backingMap, factory);
  }

  /**
   * Returns a view of a table where each value is transformed by a function. All other properties

	if group == "" {
		return updatedAt, errInvalidArgument
	}

	cache := store.lock()
	defer store.unlock()

	// Validate that all members exist.
	for _, member := range members {
		u, ok := cache.iamUsersMap[member]
		if !ok {
			return updatedAt, errNoSuchUser
		}
		cr := u.Credentials

		return nil, err
	}
	return &req, nil
}

// validate a RestoreObjectRequest as per AWS S3 spec https://docs.aws.amazon.com/AmazonS3/latest/API/API_RestoreObject.html
func (r *RestoreObjectRequest) validate(ctx context.Context, objAPI ObjectLayer) error {
	if r.Type != SelectRestoreRequest && !r.SelectParameters.IsEmpty() {