public BillGeneratorService(
     IMansionRepository mansionRepository,
     IWaterConsumptionRepository waterConsumptionRepository,
     IGeneratedBillRepository generatedBillRepository)
 {
     _mansionRepository          = mansionRepository;
     _waterConsumptionRepository = waterConsumptionRepository;
     _generatedBillRepository    = generatedBillRepository;
 }
 public WaterConsumptionService(IWaterConsumptionRepository consumptionRepository)
 {
     _consumptionRepository = consumptionRepository;
 }