sS loadSecretTextFileOrCreateWithRandomID(S name) {
  S id = trim(loadSecretTextFile(name));
  if (empty(id))
    saveSecretTextFile(name, id = aGlobalID());
  ret id;
}

sS loadSecretTextFileOrCreateWithRandomID(File f) {
  S id = trim(loadTextFile(f));
  if (empty(id))
    saveTextFile(f, id = aGlobalID());
  ret id;
}