code: @Beta
    public static <K, V> Map<K, Collection<V>> asMap(Multimap<K, V> multimap) {
      return multimap.asMap();
    }
docs: Returns {@link Multimap#asMap multimap.asMap()}. This is provided for parity with the other
  more strongly-typed {@code asMap()} implementations.
  
  @since 15.0