如何正确使用属性在IDogFactory接口中为IDog接口创建不同的实现？是否可以使用工厂接口为一个接口创建不同的实现？

type
  IDog = interface
    function GetName: string;
    procedure Test;
  end;

  IDogFactory = interface(IInvokable)
    [TTola]
    function CreateTola: IDog;
    [TRudy]
    function CreateRudy: IDog;
  end;

  IFamillyDog = interface
    function Dogs: IList<IDog>;
    function Count: Integer;
  end;

  TTola = class(TInterfacedObject, IDog)
  public
    constructor Create;
    function GetName: string;
    procedure Test;
  end;

  TRudy = class(TInterfacedObject, IDog)
  public
    constructor Create;
    function GetName: string;
    procedure Test;
  end;

  TFamillyDog = class(TInterfacedObject, IFamillyDog)
  private
    fDogs: IList<IDog>;

    function Dogs: IList<IDog>;
    function Count: Integer;
  public
    constructor Create(aFactory: IDogFactory);
  end;

Tree:
 
  C.RegisterType<IDog, TTola>('Tola');
  C.RegisterType<IDog, TRudy>('Rudy');
  C.RegisterType<IFamillyDog, TFamillyDog>;
  C.RegisterType<IDogFactory>.AsFactory;

我试图运行示例代码更改细节，我总是得到错误：
未找到类型IDog的默认值