static <A, B> Map<A, B> lambdaMapLike applyFunctionToValue(IF1<A> f, A key, Map<A, B> map) {
  ret applyFunctionToMapValue(key, f, map);
}

static <A, B> Map<A, B> lambdaMapLike applyFunctionToValue(IF1<A> f, Map<A, B> map, A... keys) {
  fOr (A key : keys)
    applyFunctionToValue(f, key, map);
  ret map;
}