code: func (c *engineIPC) Vservers() (map[string]*seesaw.Vserver, error) {
  	var vm seesaw.VserverMap
  	if err := c.client.Call("SeesawEngine.Vservers", c.ctx, &vm); err != nil {
  		return nil, err
  	}
  	return vm.Vservers, nil
  }
docs: // Vservers requests a list of all vservers that are configured on the cluster.