iterator.next();
      iterator.remove();
      assertEquals(initialSize - 1, map.size());
      // (We can't assert that the values collection no longer contains the
      // removed value, because the underlying map can have multiple mappings
      // to the same value.)
      assertInvariants(map);
      assertThrows(IllegalStateException.class, () -> iterator.remove());
    } else {
      iterator.next();

* The Gateway Class controller is a simple controller that just writes a default `GatewayClass` object describing our implementation.

    Set<Entry<K, V>> es = entrySet;
    return (es != null) ? es : (entrySet = new EntrySet(this));
  }

  /**
   * Custom Entry class used by EntryIterator.next(), that relays setValue changes to the underlying
   * map.
   */
  private final class WriteThroughEntry implements Entry<K, V> {
    final K key;
    V value;

    WriteThroughEntry(K key, V value) {
      this.key = checkNotNull(key);

}

// getVersionID will return the versionID of the underlying version.
func (j xlMetaV2Version) getVersionID() [16]byte {
	switch j.Type {
	case ObjectType:
		return j.ObjectV2.VersionID
	case DeleteType:
		return j.DeleteMarker.VersionID
	case LegacyType:
		return [16]byte{}
	}
	return [16]byte{}
}

// ToFileInfo returns FileInfo of the underlying type.

    public static class PropertiesWriter extends FilterWriter {
        private boolean typed;

        /**
         * Constructor.
         *
         * @param writer a Writer object providing the underlying stream
         */
        public PropertiesWriter(Writer writer, boolean typed) {
            super(writer);
            this.typed = typed;
        }

        /**

		Help:      "Total bytes written by the process to the underlying storage system, /proc/[pid]/io write_bytes",
		Type:      counterMetric,
	}
}

func getMinioProcessIOReadBytesMD() MetricDescription {
	return MetricDescription{
		Namespace: nodeMetricNamespace,
		Subsystem: ioSubsystem,
		Name:      readBytes,
		Help:      "Total bytes read by the process from the underlying storage system, /proc/[pid]/io read_bytes",

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		dstEntry,
		dstEntry + ".meta",
	}

	// cleanup existing paths first across all drives.
	er.cleanupMultipartPath(ctx, paths...)

	g := errgroup.WithNErrs(len(disks))

	// Rename file on all underlying storage disks.
	for index := range disks {
		index := index
		g.Go(func() error {
			if disks[index] == nil {
				return errDiskNotFound
			}

		s.writeErrorResponse(w, err)
		return false
	}

	return true
}

// IsValid - To authenticate and check if the disk-id in the request corresponds to the underlying disk.
func (s *storageRESTServer) IsValid(w http.ResponseWriter, r *http.Request) bool {
	if !s.IsAuthValid(w, r) {
		return false
	}

	if err := r.ParseForm(); err != nil {
		s.writeErrorResponse(w, err)

import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A striped {@code Lock/Semaphore/ReadWriteLock}. This offers the underlying lock striping similar
 * to that of {@code ConcurrentHashMap} in a reusable form, and extends it for semaphores and
 * read-write locks. Conceptually, lock striping is the technique of dividing a lock into many