docs: def get(self, stat_name=None):
          """Return the threshold dict.
          If stat_name is None, return the threshold for all plugins (dict of Threshold*)
          Else return the Threshold* instance for the given plugin
          """
          if stat_name is None:
              return self._thresholds
  
          if stat_name in self._thresholds:
              return self._thresholds[stat_name]
          else:
              return {}