public EmpController(
     IBulkEntityRepository <Emp> empRepository,
     ILogger <EmpController> logger,
     IMapper mapper)
     : base(logger, mapper)
 {
     this.empRepository = empRepository;
 }
 public GridController(
     IBulkEntityRepository <Emp> empRepo,
     ISingularRepository <Medium> mediumRepo,
     ILogger <GridController> logger,
     IMapper mapper)
     : base(logger, mapper)
 {
     this.empRepo    = empRepo;
     this.mediumRepo = mediumRepo;
 }