我们如何模拟IRouteHandlerRegistry？错误是CannotresolvemethodthenReturn(IHandleRoute)publicinterfaceRouteDefinition{}publicclassTestRouteimplementsRouteDefinition{}publicinterfaceIHandleRoute{RoutegetHandlerFor(TRouteroute);}publicinterfaceIRouteHandlerRegistry{IHandleRoutegetHandlerFor(TRouteroute);}@Test