code: func (cg *Consumergroup) Delete() error {
  	if instances, err := cg.Instances(); err != nil {
  		return err
  	} else if len(instances) > 0 {
  		return ErrRunningInstances
  	}
  
  	return cg.kz.deleteRecursive(fmt.Sprintf("%s/consumers/%s", cg.kz.conf.Chroot, cg.Name))
  }
docs: // Delete removes the consumergroup from zookeeper