code: public UserScenarioValidation getUserScenarioValidation(int id) {
          return invoke(USER_SCENARIO_VALIDATIONS, id,
                  new RequestClosure<JsonObject>() {
                      @Override
                      public JsonObject call(Invocation.Builder request) {
                          return request.get(JsonObject.class);
                      }
                  },
                  new ResponseClosure<JsonObject, UserScenarioValidation>() {
                      @Override
                      public UserScenarioValidation call(JsonObject json) {
                          return new UserScenarioValidation(json);
                      }
                  }
          );
      }
docs: Retrieves a user scenario validation.
  
  @param id its id
  @return {@link com.loadimpact.resource.UserScenarioValidation}