read method

@override Future<Map<String, dynamic>> read(Stateful node)

Implementation

@override
Future<Map<String, dynamic>> read(Stateful node) {
  List<Stateful> l = _listeners[node.storageKey] ??= [];
  if (!l.any((i) => identical(i, node))) {
    l.add(node);
  }
  return onRead(node);
}