class Acl {

  public static Principal getGoogleUserPrincipal(String userId) {
    checkArgument(!Strings.isNullOrEmpty(userId), "Google user ID can not be empty or null");
    return new Principal().setGsuitePrincipal(new GSuitePrincipal().setGsuiteUserEmail(userId));
  }

  private  Acl(Builder builder);

}