public static <K extends Comparable<? super K>, V> ImmutableSortedMap<K, V> of(K k1, V v1) {
    return of(Ordering.natural(), k1, v1);
  }

  /** Returns an immutable map containing a single entry. */
  private static <K, V> ImmutableSortedMap<K, V> of(Comparator<? super K> comparator, K k1, V v1) {
    return new ImmutableSortedMap<>(

  public static <K extends Comparable<? super K>, V> ImmutableSortedMap<K, V> of(K k1, V v1) {
    return of(Ordering.natural(), k1, v1);
  }

  /** Returns an immutable map containing a single entry. */
  private static <K, V> ImmutableSortedMap<K, V> of(Comparator<? super K> comparator, K k1, V v1) {
    return new ImmutableSortedMap<>(

    <V1, V2, U> ClosingFunction2<V1, V2, U> waitFor(ClosingFunction2<V1, V2, U> closingFunction2) {
      return waitFor(closingFunction2, ClosingFunction2.class);
    }

    @SuppressWarnings("unchecked") // proxy for a generic class
    <V1, V2, U> AsyncClosingFunction2<V1, V2, U> waitFor(
        AsyncClosingFunction2<V1, V2, U> asyncClosingFunction2) {

    <V1, V2, U> ClosingFunction2<V1, V2, U> waitFor(ClosingFunction2<V1, V2, U> closingFunction2) {
      return waitFor(closingFunction2, ClosingFunction2.class);
    }

    @SuppressWarnings("unchecked") // proxy for a generic class
    <V1, V2, U> AsyncClosingFunction2<V1, V2, U> waitFor(
        AsyncClosingFunction2<V1, V2, U> asyncClosingFunction2) {

   */
  public <K1 extends K, V1 extends V> CacheBuilder<K1, V1> removalListener(
      RemovalListener<? super K1, ? super V1> listener) {
    checkState(this.removalListener == null);

    // safely limiting the kinds of caches this can produce
    @SuppressWarnings("unchecked")
    CacheBuilder<K1, V1> me = (CacheBuilder<K1, V1>) this;
    me.removalListener = checkNotNull(listener);
    return me;

          K extends @Nullable Object, V1 extends @Nullable Object, V2 extends @Nullable Object>
      extends AbstractMultimap<K, V2> {
    final Multimap<K, V1> fromMultimap;
    final EntryTransformer<? super K, ? super V1, V2> transformer;

    TransformedEntriesMultimap(
        Multimap<K, V1> fromMultimap,
        final EntryTransformer<? super K, ? super V1, V2> transformer) {