android/guava/src/com/google/common/collect/ImmutableMultimap.java
@Override
  public ImmutableCollection<Entry<K, V>> entries() {
    return (ImmutableCollection<Entry<K, V>>) super.entries();
  }
@Override
  public ImmutableCollection<Entry<K, V>> entries() {
    return (ImmutableCollection<Entry<K, V>>) super.entries();
  }
Returns an immutable collection of all key-value pairs in the multimap.