code: def get_all(cls):
      
  
      req = datastore.RunQueryRequest()
      q = req.query
      set_kind(q, kind='Todo')
      add_property_orders(q, 'created')
      resp = datastore.run_query(req)
      todos = [Todo.from_proto(r.entity) for r in resp.batch.entity_results]
      return todos
docs: Query for all Todo items ordered by creation date.
  
      This method is eventually consistent to avoid the need for an extra index.