android/guava/src/com/google/common/collect/AbstractSetMultimap.java
@Override
  public Set<Entry<K, V>> entries() {
    return (Set<Entry<K, V>>) super.entries();
  }
@Override
  public Set<Entry<K, V>> entries() {
    return (Set<Entry<K, V>>) super.entries();
  }
{@inheritDoc}

<p>Because a {@code SetMultimap} has unique values for a given key, this method returns a
{@link Set}, instead of the {@link Collection} specified in the {@link Multimap} interface.