return this;
    }

    /**
     * Throws an {@code UnsupportedOperationException}.
     *
     * @since 19.0
     * @deprecated Unsupported by ImmutableSortedMap.Builder.
     */
    @CanIgnoreReturnValue
    @Override
    @Deprecated
    @DoNotCall("Always throws UnsupportedOperationException")
    public final Builder<K, V> orderEntriesByValue(Comparator<? super V> valueComparator) {

      return this;
    }

    /**
     * Throws an {@code UnsupportedOperationException}.
     *
     * @since 19.0
     * @deprecated Unsupported by ImmutableSortedMap.Builder.
     */
    @CanIgnoreReturnValue
    @Override
    @Deprecated
    @DoNotCall("Always throws UnsupportedOperationException")
    public final Builder<K, V> orderEntriesByValue(Comparator<? super V> valueComparator) {

   * method is invoked automatically by a successful call to {@link #cancel(boolean) cancel(true)}.
   *
   * <p>The default implementation does nothing.
   *
   * <p>This method is likely to be deprecated. Prefer to override {@link #afterDone}, consulting
   * {@link #wasInterrupted} to decide whether to interrupt your task.
   *
   * @since 10.0
   */
  protected void interruptTask() {}

  /**

   * you only care to match ASCII digits, you can use {@code inRange('0', '9')}.
   *
   * @deprecated Many digits are supplementary characters; see the class documentation.
   * @since 19.0 (since 1.0 as constant {@code DIGIT})
   */
  @Deprecated
  public static CharMatcher digit() {
    return Digit.INSTANCE;
  }

  /**

   * use the {@code TreeSet} constructor directly, taking advantage of <a
   * href="http://goo.gl/iz2Wi">"diamond" syntax</a>.
   *
   * <p>This method is just a small convenience for creating an empty set and then calling {@link
   * Iterables#addAll}. This method is not very useful and will likely be deprecated in the future.
   *

        out.writeObject(entry.getKey());
        out.writeObject(entry.getValue());
      }
      out.writeObject(null); // terminate entries
    }

    @SuppressWarnings("deprecation") // serialization of deprecated feature
    @J2ktIncompatible // java.io.ObjectInputStream
    MapMaker readMapMaker(ObjectInputStream in) throws IOException {
      int size = in.readInt();
      return new MapMaker()

   * you only care to match ASCII digits, you can use {@code inRange('0', '9')}.
   *
   * @deprecated Many digits are supplementary characters; see the class documentation.
   * @since 19.0 (since 1.0 as constant {@code DIGIT})
   */
  @Deprecated
  public static CharMatcher digit() {
    return Digit.INSTANCE;
  }

  /**

      return delegate;
    }
    return new UnmodifiableMultimap<>(delegate);
  }

  /**
   * Simply returns its argument.
   *
   * @deprecated no need to use this
   * @since 10.0
   */
  @Deprecated
  public static <K, V> Multimap<K, V> unmodifiableMultimap(ImmutableMultimap<K, V> delegate) {
    return checkNotNull(delegate);
  }

      @ParametricNullness
      public T next() {
        return iterator.next();
      }
    };
  }

  /**
   * Simply returns its argument.
   *
   * @deprecated no need to use this
   * @since 10.0
   */
  @Deprecated
  public static <T extends @Nullable Object> UnmodifiableIterator<T> unmodifiableIterator(
      UnmodifiableIterator<T> iterator) {
    return checkNotNull(iterator);
  }

      @ParametricNullness
      public T next() {
        return iterator.next();
      }
    };
  }

  /**
   * Simply returns its argument.
   *
   * @deprecated no need to use this
   * @since 10.0
   */
  @Deprecated
  public static <T extends @Nullable Object> UnmodifiableIterator<T> unmodifiableIterator(
      UnmodifiableIterator<T> iterator) {
    return checkNotNull(iterator);
  }