hum...what is that for ?!

hum...what is that for ?!

  TBindListEditorCommon = class(TInterfacedObject, IBindListEditorCommon)
  protected
    procedure BeginUpdate; virtual; abstract;
    procedure EndUpdate; virtual; abstract;
    procedure ClearList; virtual; abstract;
    function GetSelectedItem: TObject; virtual;
    function GetSelectedValue: TValue; virtual;
    function GetSelectedText: string; virtual; abstract;
    function GetRowCount: Integer; virtual; abstract;
    function GetPositionGetter(var AGetter: string; var ABase: Integer): Boolean; virtual; abstract;
    function GetPositionSetter(var ASetter: string; var ABase: Integer): Boolean; virtual; abstract;
  end;