code: def _update_services(self, ta_results):
          
          logger.debug("Updating TA limits on all services")
          for svc_name in sorted(ta_results.keys()):
              svc_results = ta_results[svc_name]
              if svc_name not in self.ta_services:
                  logger.info("TrustedAdvisor returned check results for "
                              "unknown service '%s'", svc_name)
                  continue
              svc_limits = self.ta_services[svc_name]
              for lim_name in sorted(svc_results):
                  if lim_name not in svc_limits:
                      logger.info("TrustedAdvisor returned check results for "
                                  "unknown limit '%s' (service %s)",
                                  lim_name,
                                  svc_name)
                      continue
                  val = svc_results[lim_name]
                  if val == 'Unlimited':
                      svc_limits[lim_name]._set_ta_unlimited()
                  else:
                      svc_limits[lim_name]._set_ta_limit(val)
          logger.info("Done updating TA limits on all services")
docs: Given a dict of TrustedAdvisor check results from :py:meth:`~._poll`
          and a dict of Service objects passed in to :py:meth:`~.update_limits`,
          updated the TrustedAdvisor limits for all services.
  
          :param ta_results: results returned by :py:meth:`~._poll`
          :type ta_results: dict
          :param services: dict of service names to _AwsService objects
          :type services: dict