get method
Get value in cache or get fallback or null
Implementation
@override
Future<V?> get(K k, {V? fallback}) async {
if (exist(k)) {
return _cache[k]?.value;
}
if (_futures.containsKey(k)) {
final res = await _futures[k]?.call();
_cache[k] = _ManagedItem(
key: k,
value: res,
expireDuration: expireDuration,
onExpired: _expiredItem,
reloadDuration: reloadDuration,
onReload: _reloadItem,
);
return res;
}
if (fallback != null) {
return fallback;
}
return null;
}