static <A> S sfuLines(Collection<A> l) {
  ret pnlStructToString(l);
}



static <A> S sfuLines(Iterable<A> l) {
  ret pnlStructToString(l);
}



static <A> S sfuLines(A[] l) {
  ret pnlStructToString(l);
}



static <A, B> S sfuLines(Map<A, B> map) {
  ret pnlStructToString(map);
}