code: def _add_history(self, entry_type, entry):
          
          meta_string = "{time} - {etype} -  {entry}".format(
              time=self._time(),
              etype=entry_type.upper(),
              entry=entry)
  
          self._content['history'].insert(0, meta_string)
          self.logger(meta_string)
docs: Generic method to add entry as entry_type to the history