docs: def should_not_sample_route(request):
      """Decided whether current request route should be sampled or not.
  
      :param: current active pyramid request
      :returns: boolean whether current request route is blacklisted.
      """
      blacklisted_routes = request.registry.settings.get(
          'zipkin.blacklisted_routes', [])
  
      if not blacklisted_routes:
          return False
      route_mapper = request.registry.queryUtility(IRoutesMapper)
      route_info = route_mapper(request).get('route')
      return (route_info and route_info.name in blacklisted_routes)