code: func (c *engineRPC) Backends() (map[string]*seesaw.Backend, error) {
  	var bm seesaw.BackendMap
  	if err := c.client.Call("SeesawECU.Backends", c.ctx, &bm); err != nil {
  		return nil, err
  	}
  	return bm.Backends, nil
  }
docs: // Backends requests a list of all backends that are configured on the cluster.