code: func (p *iscsiProvisioner) volDestroy(vol string, pool string) error {
  	client, err := p.getConnection()
  	defer client.Close()
  	if err != nil {
  		log.Warnln(err)
  		return err
  	}
  	args := volDestroyArgs{
  		Pool: pool,
  		Name: vol,
  	}
  	err = client.Call("vol_destroy", args, nil)
  	return err
  }
docs: // volDestroy removes calls vol_destroy targetd API to remove volume.