// no longer legal in JDK 17
svoid replaceACCInClassLoader(O o, AccessControlContext newACC) {
  /*
  ClassLoader cl = getClassLoaderOrSame(o);
  if (cl instanceof URLClassLoader) pcall {
    setOpt(cl, acc := newACC);
    try {
      setOpt((O) getOpt(cl, 'ucp), acc := newACC);
    } catch e {
      ifdef replaceACCInClassLoader_fullException
        printStackTrace(e);
      endifdef
      printShortException("replaceACCInClassLoader: ", e);
      if (java10OrHigher())
        if (addDefaultVMOption("--add-opens java.base/jdk.internal.loader=ALL-UNNAMED"))
          print("Please restart the OS");
    }
  }
  */
}