guava/src/com/google/common/collect/ImmutableSortedMultisetFauxverideShim.java
@Deprecated
  public static <T, E> Collector<T, ?, ImmutableMultiset<E>> toImmutableMultiset(
      Function<? super T, ? extends E> elementFunction, ToIntFunction<? super T> countFunction) {
    throw new UnsupportedOperationException();
  }
@Deprecated
  public static <T, E> Collector<T, ?, ImmutableMultiset<E>> toImmutableMultiset(
      Function<? super T, ? extends E> elementFunction, ToIntFunction<? super T> countFunction) {
    throw new UnsupportedOperationException();
  }
Not supported. Use {@link ImmutableSortedMultiset#toImmutableSortedMultiset} instead. This
method exists only to hide {@link ImmutableMultiset#toImmutableMultiset} from consumers of
{@code ImmutableSortedMultiset}.

@throws UnsupportedOperationException always
@deprecated Use {@link ImmutableSortedMultiset#toImmutableSortedMultiset}.
@since 22.0