toRest method Null safety
- RunLocation input,
 - {required RestProvider provider,
 - covariant OfflineFirstWithRestRepository? repository}
 
override
    Implementation
@override
Future<Map<String, dynamic>> toRest(RunLocation input,
        {required provider,
        covariant OfflineFirstWithRestRepository? repository}) async =>
    await _$RunLocationToRest(input,
        provider: provider, repository: repository);