def download(kb_id, environment, custom_headers:nil)
      response = download_async(kb_id, environment, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def download(kb_id, environment, custom_headers:nil)
      response = download_async(kb_id, environment, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
Download the knowledgebase.

 @param kb_id [String] Knowledgebase id.
 @param environment [EnvironmentType] Specifies whether environment is Test or
 Prod. Possible values include: 'Prod', 'Test'
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [QnADocumentsDTO] operation results.