public LoadDemoVariantForExecution(
     IOperationContextFactory <IGraphLabsContext> operationFactory,
     IAuthenticationSavingService authService,
     IInitParamsProvider initParamsProvider,
     TaskExecutionModelLoader taskModelLoader,
     TestExecutionModelLoader testExecutionModelLoader)
     : base(operationFactory, authService, initParamsProvider, taskModelLoader, testExecutionModelLoader)
 {
 }
 protected LoadVariantForExecutionBase(
     IOperationContextFactory <IGraphLabsContext> operationFactory,
     IAuthenticationSavingService authService,
     IInitParamsProvider initParamsProvider,
     TaskExecutionModelLoader taskModelLoader,
     TestExecutionModelLoader testModelLoader)
     : base(operationFactory)
 {
     _testModelLoader    = testModelLoader;
     _authService        = authService;
     _initParamsProvider = initParamsProvider;
     _taskModelLoader    = taskModelLoader;
     _operationFactory   = operationFactory;
 }