fetch<T> method
Fetches an asyncField
value.
Implementation
FutureOr<T> fetch<T>(AsyncField<T> asyncField) {
if (isClosed) {
var value = asyncField.value;
if (value != null) {
return value;
}
try {
return null as T;
} catch (_) {
throw StateError(
"Closed `storage`: can't return `null` value @ AsyncField#${asyncField.id.key}");
}
}
throw AsyncFieldError(
'No fetcher for ${asyncField.runtimeType}', asyncField.id);
}