FillRaw method
Fills a tracked slot of count pointers by calling init(i) for each index.
Implementation
Pointer<Pointer<T>> FillRaw(int count, Pointer<T> Function(int) init, {String? key}) {
final pp = At(_slotKey(key), count);
for (int i = 0; i < count; i++) pp[i] = init(i);
return pp;
}