protected virtual void FillSourceStepFactory(IMvxSourceStepFactoryRegistry registry) { registry.AddOrOverwrite(typeof(MvxCombinerSourceStepDescription), new MvxCombinerSourceStepFactory()); registry.AddOrOverwrite(typeof(MvxPathSourceStepDescription), new MvxPathSourceStepFactory()); registry.AddOrOverwrite(typeof(MvxLiteralSourceStepDescription), new MvxLiteralSourceStepFactory()); }