/// <summary>
 /// Class Constructor
 /// </summary>
 /// <param name="view">isntance of the phone listing view</param>
 public PhoneListingViewModel(IPhoneListingView view)
 {
     _view = view;
     _employeeModel = new EmployeeModel();
     _customerModel = new CustomerModel();
     _divisionModel = new DivisionModel();
 }
 public PhoneListingPresenter(IPhoneListingView view)
 {
     _view = view;
     _viewModel = new PhoneListingViewModel(_view);
 }