public static <K, V> Function<K, V> asFunction(Map<K, ? extends V> map,
      Function<K, ? extends V> defaultFunction) {
    return new ForMapWithDefaultFunction<K, V>(map, defaultFunction);
  }
public static < K , V > Function < K , V > asFunction ( Map < K , ? extends V > map , Function < K , ? extends V > defaultFunction ) { return new ForMapWithDefaultFunction < K , V > ( map , defaultFunction ) ; }
Just like {@link com.google.common.base.Functions#forMap(Map, Object)} except it allows a
potentially non-constant {@link Function} as the default.