import "package:flutter_riverpod/flutter_riverpod.dart"; typedef JumpRequest = ({String roomId, int rowId}); class JumpRequestController extends Notifier { @override JumpRequest? build() => null; void request(String roomId, int rowId) => state = (roomId: roomId, rowId: rowId); void consume() => state = null; static final provider = NotifierProvider( JumpRequestController.new, ); }