private void ExecuteDropLineCommand(ProfileConnectorModel parameter)
        {
            parameter.Departures.Add(_dragItem as ProfileConnectorModel);
            (_dragItem as ProfileConnectorModel).Arrivals.Add(parameter);

            NodeConnectors.Add(new NodeConnectorModel()
            {
                DepartureNode = _dragItem as ProfileConnectorModel,
                ArrivalNode   = parameter,
            });
        }