docs: def add(self, stat_name, threshold_description):
          """Add a new threshold to the dict (key = stat_name)"""
          if threshold_description not in self.threshold_list:
              return False
          else:
              self._thresholds[stat_name] = getattr(self.current_module,
                                                    'GlancesThreshold' + threshold_description.capitalize())()
              return True