public ColumnListViewModel()
 {
     Database = new DatabaseBaseViewModel();
     Table    = new TableViewModel();
     View     = new ViewViewModel();
     Items    = new List <ColumnLineItemViewModel>();
 }
 public ColumnListViewModel(UserSession userSession, BaseUserSessionViewModel baseUserSessionViewModel)
     : base(userSession, baseUserSessionViewModel)
 {
     Database = new DatabaseBaseViewModel();
     Table    = new TableViewModel();
     View     = new ViewViewModel();
     Items    = new List <ColumnLineItemViewModel>();
 }