static <A> S safeMapEachLine_str(S text, IF1<S, A> f) {
  ret safeMapEachLine(x -> str(f.get(x)), text);
}

static <A> S lambdaMapLike safeMapEachLine_str(IF1<S, A> f, S text) {
  ret safeMapEachLine_str(text, f);
}