code: func (u *volumeUtil) DeleteContents(fullPath string) error {
  	dir, err := os.Open(fullPath)
  	if err != nil {
  		return err
  	}
  	defer dir.Close()
  
  	files, err := dir.Readdirnames(-1)
  	if err != nil {
  		return err
  	}
  	errList := []error{}
  	for _, file := range files {
  		err = os.RemoveAll(filepath.Join(fullPath, file))
  		if err != nil {
  			errList = append(errList, err)
  		}
  	}
  
  	return utilerrors.NewAggregate(errList)
  }
docs: // DeleteContents deletes all the contents under the given directory