code: public TagsEnvelope getTagsByCategories(String categories) throws ApiException {
          ApiResponse<TagsEnvelope> resp = getTagsByCategoriesWithHttpInfo(categories);
          return resp.getData();
      }
docs: Get all tags of categories
  Get all tags related to the list of categories
  @param categories Comma separated list of categories. (optional)
  @return TagsEnvelope
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body