code: def set_threshold_override(self, limit_name, warn_percent=None,
                                 warn_count=None, crit_percent=None,
                                 crit_count=None):
          
          try:
              self.limits[limit_name].set_threshold_override(
                  warn_percent=warn_percent,
                  warn_count=warn_count,
                  crit_percent=crit_percent,
                  crit_count=crit_count
              )
          except KeyError:
              raise ValueError("{s} service has no '{l}' limit".format(
                  s=self.service_name,
                  l=limit_name))
docs: Override the default warning and critical thresholds used to evaluate
          the specified limit's usage. Theresholds can be specified as a
          percentage of the limit, or as a usage count, or both.
  
          :param warn_percent: new warning threshold, percentage used
          :type warn_percent: int
          :param warn_count: new warning threshold, actual count/number
          :type warn_count: int
          :param crit_percent: new critical threshold, percentage used
          :type crit_percent: int
          :param crit_count: new critical threshold, actual count/number
          :type crit_count: int