code: func (c *CookbookService) GetVersion(name, version string) (data Cookbook, err error) {
  	url := fmt.Sprintf("cookbooks/%s/%s", name, version)
  	c.client.magicRequestDecoder("GET", url, nil, &data)
  	return
  }
docs: // GetVersion fetches a specific version of a cookbooks data from the server api
  //   GET /cookbook/foo/1.2.3
  //   GET /cookbook/foo/_latest
  //   Chef API docs: https://docs.chef.io/api_chef_server.html#cookbooks-name-version