code: func (c *Client) LoadThumbprints(file string) error {
  	if file == "" {
  		return nil
  	}
  
  	for _, name := range filepath.SplitList(file) {
  		err := c.loadThumbprints(name)
  		if err != nil {
  			return err
  		}
  	}
  
  	return nil
  }
docs: // LoadThumbprints from file with the give name.
  // If name is empty or name does not exist this function will return nil.