static <A extends AutoCloseable, B> L<B> mapCloseables_pcall(Iterable<A> l, IF1<A, B> f) {
  L x = emptyList(l);
  if (l != null) for (A o : l) try {
    pcall {
      x.add(f.get(o));
    }
  } finally {
    _close(o);
  }
  ret x;
}

static <A extends AutoCloseable, B> L<B> lambdaMapLike mapCloseables_pcall(IF1<A, B> f, Iterable<A> l) {
  ret mapCloseables_pcall(l, f);
}

Began life as a copy of #1010000