svoid <A> lambdaMapLike removeElementsThat(IPred<A> pred, Cl<A> c) {
  if (c == null || pred == null) ret;
  Iterator<A> it = iterator(c);
  while (it.hasNext())
    if (pred.get(it.next()))
      it.remove();
}

svoid <A> lambdaMapLike removeElementsThat(Cl<A> c, IPred<A> pred) {
  removeElementsThat(pred, c);
}