static L<AbstractAction> paramsToAbstractActions(O... params) {
  new L<AbstractAction> l;
  for (int i = 0; i+1 < l(params); i += 2) {
    S text = cast params[i];
    Runnable action = cast params[i+1];
    if (nempty(text))
      l.add(abstractAction(text, action));
  }
  ret l;
}