static void swingAndWait(Runnable r) ctex {
  if (isAWTThread())
    r.run();
  else {
    r = addThreadInfoToRunnable(r);
    executingSwingCode(r);
    EventQueue.invokeAndWait(r);
  }
}

static O swingAndWait(O f) {
  if (isAWTThread())
    ret callF(f);
  else {
    new Var result;
    swingAndWait(r {
      result.set(callF(f));
    });
    ret result!;
  }
}