protected Set<Integer> getNeeds(String type, Counters counts) {
CounterGroup group = counts.getGroup(type);
HashSet<Integer> result = new HashSet<Integer>(group.size());
for (Counter counter : group) {
String name = counter.getName();
assert name.startsWith("t");
result.add(Integer.parseInt(name.substring(1)));
}
return result;
}
