code: public Observable<UUID> addClosedListAsync(UUID appId, String versionId, ClosedListModelCreateObject closedListModelCreateObject) {
          return addClosedListWithServiceResponseAsync(appId, versionId, closedListModelCreateObject).map(new Func1<ServiceResponse<UUID>, UUID>() {
              @Override
              public UUID call(ServiceResponse<UUID> response) {
                  return response.body();
              }
          });
      }
docs: Adds a closed list model to the application.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param closedListModelCreateObject A model containing the name and words for the new closed list entity extractor.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the UUID object