private void GenerateRecord(IServiceCharge charge, IServiceCall call)
        {
            var newRecord = new Record(call.PhoneNumber,
                                       call.GetStartTime(),
                                       charge.Description,
                                       call.ToString(),
                                       charge.CalculateCharge(call));

            _recordRepository.SaveRecord(newRecord);
        }
 public void SaveRecord(Record record)
 {
     _records.Add(record);
 }