private void OutputVariables()
        {
            using var writer = new StreamWriter("variables.csv");
            using var csv    = new CsvWriter(writer, CultureInfo.InvariantCulture);
            csv.Context.RegisterClassMap <CsvVariableMap>();
            var variablesData = _mapper.Map <List <CsvDatabaseVariable> >(_variables.GetValues());

            csv.WriteRecords(variablesData);
        }