guava/src/com/google/common/collect/Multimaps.java
@Beta
  public static <K, V> Map<K, Collection<V>> asMap(Multimap<K, V> multimap) {
    return multimap.asMap();
  }
@Beta
  public static <K, V> Map<K, Collection<V>> asMap(Multimap<K, V> multimap) {
    return multimap.asMap();
  }
Returns {@link Multimap#asMap multimap.asMap()}. This is provided for parity with the other
more strongly-typed {@code asMap()} implementations.

@since 15.0