anchor.diff:  
       @GET
       @Path("/name/{name}")
  -    Set<Country> getByName(@PathParam("name") String name);
  +    Set<Country> getByName(String name);
   
   
       @GET
       @Path("/name/{name}")
       @Produces("application/json")
  -    CompletionStage<Set<Country>> getByNameAsync(@PathParam("name") String name);
  +    CompletionStage<Set<Country>> getByNameAsync(String name);
   }
   ----
   
  
positive.code:     @GET
      @Path("/name/{name}")
      @Blocking // <2>
      public Set<Country> name(@RestPath String name) {
          return countriesService.getByName(name);
      }
  }
  
negative.code: 
      @GET
      @Path("/name/{name}")
      Set<Country> getByName(@PathParam("name") String name);
  
      @GET
      @Path("/name/{name}")
      CompletionStage<Set<Country>> getByNameAsync(@PathParam("name") String name);
  }
  ----
  