static <A, B> Map<A, B> filterValues(Map<A, B> map, IF1<B, Bool> pred) {
  ret filterMapByValuePredicate(map, pred);
}



static <A, B> Map<A, B> filterValues(IF1<B, Bool> pred, Map<A, B> map) {
  ret filterMapByValuePredicate(pred, map);
}