android - Andoird Swagger UI how to implement empty response -

i have question regarding swagger ui. response request want post following:

enter image description here

its empty response, isnt it? right way implement it?

public int setfavdish(long dishiddetailactivity){     int empty = 0;      string token_string = token_type + " " + token;      //log.d("favdish",token_string);       favoriterequest favoriterequest = new favoriterequest(true);     call canteencall = pdpservice.savefavdish(token_string, dishiddetailactivity, favoriterequest );     canteencall.enqueue(new callback()     {         @override         public void onresponse(call call, response response) {             if (response.issuccessful()) {              log.d("test","successful");              } else {                  log.d("test","not successful");             }          }          @override         public void onfailure(call call, throwable t) {             log.d("test","error");         }     });     return empty; }