public int compareTo(Object o) {
      return toString().compareTo(o.toString());
    }

    @Override
    public String toString() {
      return "BY_TO_STRING";
    }

    private Object readResolve() {
      return INSTANCE;
    }
  }

  // Always equal is a valid total ordering. And it works for any Object.
  private static final class AlwaysEqual extends Ordering<@Nullable Object>

    final ImmutableMultiset<E> multiset;

    EntrySetSerializedForm(ImmutableMultiset<E> multiset) {
      this.multiset = multiset;
    }

        Object readResolve() {
      return multiset.entrySet();
    }
  }

  @GwtIncompatible
  @J2ktIncompatible
  @Override
    Object writeReplace() {
    return new SerializedForm(this);
  }

    private final Map<Class<? extends @NonNull B>, B> backingMap;

    SerializedForm(Map<Class<? extends @NonNull B>, B> backingMap) {
      this.backingMap = backingMap;
    }

    Object readResolve() {
      return create(backingMap);
    }

    private static final long serialVersionUID = 0;
  }

  @Override
  @DoNotCall("Always throws UnsupportedOperationException")
  public <T extends B> @Nullable T putInstance(Class<T> type, T value) {
    throw new UnsupportedOperationException();
  }

  Object readResolve() {
    return isEmpty() ? of() : this;
  }

    final DiscreteDomain<C> domain;

    private SerializedForm(Range<C> range, DiscreteDomain<C> domain) {
      this.range = range;
      this.domain = domain;
    }

    private Object readResolve() {
      return new RegularContiguousSet<>(range, domain);
    }
  }

  @GwtIncompatible
  @J2ktIncompatible
    @Override
  Object writeReplace() {
    return new SerializedForm<>(range, domain);

          table.rowKeySet().toArray(),
          table.columnKeySet().toArray(),
          table.values().toArray(),
          cellRowIndices,
          cellColumnIndices);
    }

    Object readResolve() {
      if (cellValues.length == 0) {
        return of();
      }
      if (cellValues.length == 1) {
        return of(rowKeys[0], columnKeys[0], cellValues[0]);
      }

    private final DiscreteDomain<C> domain;

    AsSetSerializedForm(ImmutableList<Range<C>> ranges, DiscreteDomain<C> domain) {
      this.ranges = ranges;
      this.domain = domain;
    }

    Object readResolve() {
      return new ImmutableRangeSet<C>(ranges).asSet(domain);
    }
  }

  /**
   * Returns {@code true} if this immutable range set's implementation contains references to

    private final ImmutableBiMap<K, V> forward;

    InverseSerializedForm(ImmutableBiMap<K, V> forward) {
      this.forward = forward;
    }

    Object readResolve() {
      return forward.inverse();
    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 1;
  }

  // redeclare to help optimizers with b/310253115

  }

  private boolean isPartialView() {
    return start > 0 || end < array.length;
  }

  Object writeReplace() {
    return trimmed();
  }

  Object readResolve() {
    return isEmpty() ? EMPTY : this;
  }

  }

  private boolean isPartialView() {
    return start > 0 || end < array.length;
  }

  Object writeReplace() {
    return trimmed();
  }

  Object readResolve() {
    return isEmpty() ? EMPTY : this;
  }