operator [] method
Implementation
V? operator [](Object? key) {
final node = _lruMap[key];
if (node == null) return null;
_afterNodeAccess(node);
return node.value;
}
V? operator [](Object? key) {
final node = _lruMap[key];
if (node == null) return null;
_afterNodeAccess(node);
return node.value;
}