resizeForCapacity method
Grows every per-nid array to at least newCapacity, zero-filled
(zero stamps are stale by the generation invariant). Wired into
TreeController._onStoreCapacityGrew, the same lockstep protocol
every other per-nid array uses.
Implementation
void resizeForCapacity(int newCapacity) {
if (newCapacity <= _slotStamp.length) {
return;
}
_parentStamp = _grownCopy(_parentStamp, newCapacity);
_slotStamp = _grownCopy(_slotStamp, newCapacity);
final grownIndex = Int32List(newCapacity);
grownIndex.setRange(0, _liveIndex.length, _liveIndex);
_liveIndex = grownIndex;
}