code: public Observable<Terms> getAllTermsAsync(String listId, String language, GetAllTermsOptionalParameter getAllTermsOptionalParameter) {
          return getAllTermsWithServiceResponseAsync(listId, language, getAllTermsOptionalParameter).map(new Func1<ServiceResponse<Terms>, Terms>() {
              @Override
              public Terms call(ServiceResponse<Terms> response) {
                  return response.body();
              }
          });
      }
docs: Gets all terms from the list with list Id equal to the list Id passed.
  
  @param listId List Id of the image list.
  @param language Language of the terms.
  @param getAllTermsOptionalParameter 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 Terms object