private void remove(long id, int index, TLongObjectHashMap<TIntArrayList> map) {
TIntArrayList list = map.get(id);
if (list == null) return;
list.remove(index);
if (list.size() == 0) map.remove(id);
}
public K remove(int key1, int key2) {
long key = (((long) key1) << 32) | (((long) key2) & 0xFFFFFFFFL);
return map.remove(key);
}