code: public Observable<Integer> addExplicitListItemAsync(UUID appId, String versionId, UUID entityId, AddExplicitListItemOptionalParameter addExplicitListItemOptionalParameter) {
          return addExplicitListItemWithServiceResponseAsync(appId, versionId, entityId, addExplicitListItemOptionalParameter).map(new Func1<ServiceResponse<Integer>, Integer>() {
              @Override
              public Integer call(ServiceResponse<Integer> response) {
                  return response.body();
              }
          });
      }
docs: Add a new item to the explicit list for the Pattern.Any entity.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param entityId The Pattern.Any entity extractor ID.
  @param addExplicitListItemOptionalParameter the object representing the optional parameters to be set before calling this API
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the Integer object