public PeerListService(
     IPeerListRepository repository,
     IEnumerable <ICryptocoinService> cryptoCoinServices
     )
 {
     _repository         = repository;
     _cryptoCoinServices = cryptoCoinServices;
 }
 public PeersController(IEnumerable <ICryptocoinService> cryptoCoinServices, IPeerListRepository repository)
 {
     _cryptoCoinServices = cryptoCoinServices;
     _repository         = repository;
 }