static ArrayList emptyList() {
  ret new ArrayList;
  //ret Collections.emptyList();
}

static ArrayList emptyList(int capacity) {
  ret new ArrayList(max(0, capacity));
}

// Try to match capacity
static ArrayList emptyList(Iterable l) {
  ret l instanceof Collection ? emptyList(((Collection) l).size()) : emptyList();
}

static ArrayList emptyList(O[] l) {
  ret emptyList(l(l));
}

// get correct type at once
static <A> ArrayList<A> emptyList(Class<A> c) {
  ret new ArrayList;
}