code: public Observable<List<EntityExtractor>> listEntitiesAsync(UUID appId, String versionId, ListEntitiesOptionalParameter listEntitiesOptionalParameter) {
          return listEntitiesWithServiceResponseAsync(appId, versionId, listEntitiesOptionalParameter).map(new Func1<ServiceResponse<List<EntityExtractor>>, List<EntityExtractor>>() {
              @Override
              public List<EntityExtractor> call(ServiceResponse<List<EntityExtractor>> response) {
                  return response.body();
              }
          });
      }
docs: Gets information about the entity models.
  
  @param appId The application ID.
  @param versionId The version ID.
  @param listEntitiesOptionalParameter 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 List&lt;EntityExtractor&gt; object