getCachedAsyncNullable method
Implementation
FutureOr<V?> getCachedAsyncNullable(K key, FutureOr<V?> Function() computer,
{int? cacheLimit}) {
checkCachedEntry(key);
var cached = this[key];
if (cached != null) return cached;
checkCacheLimit(cacheLimit);
return computer().resolveMapped((val) {
if (val == null) return null;
this[key] = val;
return val;
});
}