addRoute method
Adds a route that responds to the given path for requests with the given method (case-insensitive). Provide '*' as the method to respond to all methods.
Implementation
@override
Route<T> addRoute(String method, String path, handler,
{Iterable<T> middleware = const []}) {
var route = super.addRoute(method, path, handler,
middleware: [..._handlers, ...middleware]);
//_root._routes.add(route);
return route;
}