delete method

@override Future<void> delete(int key)

Implementation

@override
Future<void> delete(int key) async {
  _checkInitialized();
  Map<String, dynamic>? r = history.remove(key.toString());
  if (r != null) {
    deleted.broadcast(
      HistoryEvent(
        JsonRpcRecord.fromJson(
          r,
        ),
      ),
    );
  }
  await persist();
}