code: def _match(self, request, response):
          
          is_html = 'text/html' in response.get('Content-Type', '')
          if is_html and hasattr(response, 'rendered_content'):
              correct_path = PATH_MATCHER.match(request.path) is not None
              not_included = self.include_flag not in response.rendered_content
              return correct_path and not_included
          return False
docs: Match all requests/responses that satisfy the following conditions:
  
          * An Admin App; i.e. the path is something like /admin/some_app/
          * The ``include_flag`` is not in the response's content