@SuppressWarnings("RedundantOverride")
          @Override
          @J2ktIncompatible // serialization
          @GwtIncompatible // serialization
          Object writeReplace() {
            return super.writeReplace();
          }
        };
      }

      @Override
      ImmutableMap<K, V> map() {
        return ImmutableSortedMap.this;
      }

          @SuppressWarnings("RedundantOverride")
          @Override
          @J2ktIncompatible // serialization
          @GwtIncompatible // serialization
          Object writeReplace() {
            return super.writeReplace();
          }
        };
      }

      @Override
      ImmutableMap<K, V> map() {
        return ImmutableSortedMap.this;
      }

            @SuppressWarnings("RedundantOverride")
            @Override
            @J2ktIncompatible // serialization
            @GwtIncompatible // serialization
            Object writeReplace() {
              return super.writeReplace();
            }
          };
      return new CartesianSet<E>(axes, new CartesianList<E>(listAxes));
    }

  }

  @Override
  public String toString() {
    return Types.toString(runtimeType);
  }

  /** Implemented to support serialization of subclasses. */
  protected Object writeReplace() {
    // TypeResolver just transforms the type to our own impls that are Serializable
    // except TypeVariable.
    return of(new TypeResolver().resolveType(runtimeType));
  }

  /**

    Iterators.addAll(result, c.iterator());
    return result;
  }

  // Serialization Support

  private static final long serialVersionUID = 5;

  Object writeReplace() {
    return new SerializationProxy<>(
        entryHelper.keyStrength(),
        entryHelper.valueStrength(),
        keyEquivalence,
        entryHelper.valueStrength().defaultEquivalence(),