static Thread newDaemonThread(O r) {
  Thread t = newThread(r);
  t.setDaemon(true);
  ret t;
}

static Thread newDaemonThread(O r, S name) {
  Thread t = newThread(r, name);
  t.setDaemon(true);
  ret t;
}

static Thread newDaemonThread(S name, O r) {
  ret newDaemonThread(r, name);
}