code: def refresh(self, module=None):
          
          module = module._mdl if module is not None else ffi.NULL
  
          lib.EnvRefreshAgenda(self._env, module)
docs: Recompute the salience values of the Activations on the Agenda
          and then reorder the agenda.
  
          The Python equivalent of the CLIPS refresh-agenda command.
  
          If no Module is specified, the current one is used.