* @return boolean
   */
  static boolean externalIdHeadP(Stella_Object attribute) {
    return (Stella_Object.isaP(attribute, Stella.SGT_STELLA_STRING_WRAPPER) &&
        (Stella.stringEqlP(((StringWrapper)(attribute)).wrapperValue, "SYSTEM") ||
         Stella.stringEqlP(((StringWrapper)(attribute)).wrapperValue, "PUBLIC")));
  }