annotation but parameter should be Nullable. fix
@@ -2462,7 +2462,7 @@ public interface Route {
* @param rsp A HTTP response.
* @throws Throwable If invocation goes wrong.
*/
- void next(String prefix, Request req, Response rsp) throws Throwable;
+ void next(@Nullable String prefix, Request req, Response rsp) throws Throwable;
/**
* Invokes the next route in the chain.
