code: public static <A, B> LambdaMap<A, B> wrap(Map<A, B> map) {
          return new LambdaMap<>(map);
      }
docs: Wrap a {@link Map} in a {@link LambdaMap}.
  
  @param map the {@link Map}
  @param <A> the key type
  @param <B> the value type
  @return the {@link Map} wrapped in a {@link LambdaMap}