static Set sortedKeys(Map map) {
ret sorted(keys(map));
}
static Set sortedKeys(O map) {
ret sorted(keys(map));
}
ifclass MultiSet
static Set sortedKeys(MultiSet ms) {
ret sorted(keys(ms));
}
endif
ifclass MultiMap
static Set sortedKeys(MultiMap mm) {
ret sorted(keys(mm));
}
endif