public UpdateCellViewModel(IEventAggregator eventAggregator, ICellTypeEndpoint cellTypeEndpoint, ICellEndpoint cellEndpoint)
 {
     _eventAggregator = eventAggregator;
     _eventAggregator.Subscribe(this);
     _cellTypeEndpoint = cellTypeEndpoint;
     _cellEndpoint     = cellEndpoint;
 }
 public AddCellViewModel(IEventAggregator eventAggregator, ICellTypeEndpoint cellTypeEndpoint, ICellEndpoint cellEndpoint)
 {
     _eventAggregator  = eventAggregator;
     _cellTypeEndpoint = cellTypeEndpoint;
     _cellEndpoint     = cellEndpoint;
 }