code: func (c *CookbookService) GetAvailableVersions(name, numVersions string) (data CookbookListResult, err error) {
  	path := versionParams(fmt.Sprintf("cookbooks/%s", name), numVersions)
  	err = c.client.magicRequestDecoder("GET", path, nil, &data)
  	return
  }
docs: // GetAvailable returns the versions of a coookbook available on a server