if err != nil {
		t.Fatal(err)
	}
	e := want.find("abucket/dir2")
	want.replace("abucket/dir2", "", *e)
	var buf bytes.Buffer
	err = want.serializeTo(&buf)
	if err != nil {
		t.Fatal(err)
	}
	t.Log("serialized size:", buf.Len(), "bytes")
	var got dataUsageCache
	err = got.deserialize(&buf)
	if err != nil {
		t.Fatal(err)
	}
	if got.Info.LastUpdate.IsZero() {

	dataUsageCacheVerV5      = 5
	dataUsageCacheVerV4      = 4
	dataUsageCacheVerV3      = 3
	dataUsageCacheVerV2      = 2
	dataUsageCacheVerV1      = 1
)

// serialize the contents of the cache.
func (d *dataUsageCache) serializeTo(dst io.Writer) error {
	// Add version and compress.
	_, err := dst.Write([]byte{dataUsageCacheVerCurrent})
	if err != nil {
		return err
	}
	enc, err := zstd.NewWriter(dst,

var serializerMap = sync.Map{}

// RegisterSerializer register serializer
func RegisterSerializer(name string, serializer SerializerInterface) {
	serializerMap.Store(strings.ToLower(name), serializer)
}

// GetSerializer get serializer
func GetSerializer(name string) (serializer SerializerInterface, ok bool) {
	v, ok := serializerMap.Load(strings.ToLower(name))
	if ok {
		serializer, ok = v.(SerializerInterface)
	}
	return serializer, ok
}

* Existing usages of Serializer outside of this infrastructure should be migrated to use it.
* Existing usages of Java serialization should be migrated to use it.
* It is ok for Serializer to be used as a replacement for Java serialization as a migration step.

   *
   * @return the re-serialized object
   * @throws RuntimeException if the specified object was not successfully serialized or
   *     deserialized
   */
  @CanIgnoreReturnValue
  public static <T> T reserialize(T object) {
    return Platform.reserialize(object);
  }

  /**
   * Serializes and deserializes the specified object and verifies that the re-serialized object is

     * be created automatically.
     *
     * @param output The file to serialize the settings to, must not be {@code null}.
     * @param options The options to use for serialization, may be {@code null} to use the default values.
     * @param settings The settings to serialize, must not be {@code null}.
     * @throws IOException If the settings could not be serialized.
     */

     * created automatically.
     *
     * @param output The file to serialize the model to, must not be {@code null}.
     * @param options The options to use for serialization, may be {@code null} to use the default values.
     * @param model The model to serialize, must not be {@code null}.
     * @throws IOException If the model could not be serialized.
     */

     * the method returns.
     *
     * @param output The writer to serialize the toolchains to, must not be {@code null}.
     * @param options The options to use for serialization, may be {@code null} to use the default values.
     * @param toolchains The toolchains to serialize, must not be {@code null}.
     * @throws IOException If the toolchains could not be serialized.
     */

final class SingletonImmutableList<E> extends ForwardingImmutableList<E> {

  final transient List<E> delegate;
  // This reference is used both by the custom field serializer, and by the
  // GWT compiler to infer the elements of the lists that needs to be
  // serialized.
  E element;

  SingletonImmutableList(E element) {
    this.delegate = singletonList(checkNotNull(element));
    this.element = element;
  }

  @Override

 * serialize collections that are defined elsewhere.
 *
 * @author Jared Levy
 */
@GwtIncompatible
@J2ktIncompatible
@ElementTypesAreNonnullByDefault
final class Serialization {
  private Serialization() {}

  /**
   * Reads a count corresponding to a serialized map, multiset, or multimap. It returns the size of