code: def not_storable(_type):
      
      return Storable(_type, handlers=StorableHandler(poke=fake_poke, peek=fail_peek(_type)))
docs: Helper for tagging unserializable types.
  
      Arguments:
  
          _type (type): type to be ignored.
  
      Returns:
  
          Storable: storable instance that does not poke.