uniq method
void
uniq()
Make all values unique, preserving the order
Implementation
void uniq() {
if (values.length <= 1) {
return;
}
// ignore: prefer_collection_literals
final uniques = LinkedHashMap<T, bool>();
for (final s in values) {
uniques[s] = true;
}
values.clear();
values.addAll(uniques.keys);
}