static <A> S pnlToString(S prefix, Iterable<A> l) {
  ret hijackPrint(r { pnl(prefix, l) });
}

static <A> S pnlToString(final Iterable<A> l) {
  ret hijackPrint(r { pnl(l) });
}

static <A> S pnlToString(final A[] l) {
  ret hijackPrint(r { pnl(l) });
}

static <A, B> S pnlToString(final Map<A, B> map) {
  ret hijackPrint(r { pnl(map) });
}

ifclass MultiMap
static <A, B> S pnlToString(MultiMap<A, B> map) {
  ret pnlToString(multiMapToMap(map));
}
endif

Began life as a copy of #1014738