
  -spec to_sets(ASet) -> Sets
                   when
                       ASet :: a_set() | ordset(),
                       Sets :: tuple_of(AnySet) | [AnySet],
                       AnySet :: anyset().

  Returns the elements of the ordered set ASet as a tuple of sets,
  and the elements of the unordered set ASet as a sorted list of
  sets without duplicates.
