docs: def count(self, event_str, inc_int=1):
          """Count an event.
  
          Args:
            event_str:
              The name of an event to count. Used as a key in the event dict. The same
              name will also be used in the summary.
  
            inc_int: int
              Optional argument to increase the count for the event by more than 1.
  
          """
          self._event_dict.setdefault(event_str, 0)
          self._event_dict[event_str] += inc_int