code: func QueryableClient(c *Client) storage.Queryable {
  	remoteReadQueries.WithLabelValues(c.Name())
  	return storage.QueryableFunc(func(ctx context.Context, mint, maxt int64) (storage.Querier, error) {
  		return &querier{
  			ctx:    ctx,
  			mint:   mint,
  			maxt:   maxt,
  			client: c,
  		}, nil
  	})
  }
docs: // QueryableClient returns a storage.Queryable which queries the given
  // Client to select series sets.