operator [] method
Implementation
List<V> operator [](List<K?> key) {
bool hasNone = false;
for (var i = 0; i < size; i++) {
if (key[i] == null) {
hasNone = true;
break;
}
}
if (hasNone) {
return getFilter(key);
} else {
var r = getExact(key.map((e) => e!).toList());
if (r == null) {
return [];
} else {
return [r];
}
}
}