code: def clear(self):
          
  
          for walker in self._virtual_walkers:
              walker.skip_all()
  
          self._engine.clear()
  
          for walker in self._queue_walkers:
              walker.skip_all()
  
          self._last_values = {}
docs: Clear all data from this sensor_log.
  
          All readings in all walkers are skipped and buffered data is
          destroyed.