static ItIt<Int> fromToI(int a default 0, int b) {
  ret countIterator(a, b);
}





static <A> ItIt<A> fromToI(int a default 0, int b, IF1<Int, A> f) {
  ret countIterator(a, b, f);
}



static ItIt<Int> fromToI(int a, int b, int step) {
  ret countIterator(a, b, step);
}