sS shorten_nullOnNull(CharSequence s) { ret shorten_nullOnNull(s, shorten_default); }

sS shorten_nullOnNull(CharSequence s, int max) {
  ret shorten_nullOnNull(s, max, "...");
}

sS shorten_nullOnNull(CharSequence s, int max, S shortener) {
  if (s == null) null;
  ret shorten(s, max, shortener);
}

sS shorten_nullOnNull(int max, CharSequence s) { ret shorten_nullOnNull(s, max); }

Began life as a copy of #1000644