compare method
Compares two values.
Implementation
@override
int compare(Set<E> left, Set<E> right) {
if (equality.equals(left, right)) {
return 0;
}
final leftList = left.toList();
leftList.sort(elementKind.compare);
final rightList = right.toList();
rightList.sort(elementKind.compare);
return ListKind(elementKind: elementKind).compare(leftList, rightList);
}