static LineComped<Char, Unit> lineComp_compressTextAsChars(S text) {
  SS data = litmap("" := lambdaMap charToHex(characters(text)));
  LineCompCompressor compressor = new(data);
  compressor.verify = true;
  compressor.run();
  
  new L<Char> literals;
  new LPair<Int> pairs;
  for (Chunk c : chunks)
    if (c cast CPair)
      pairs.add(IntPair(c.i1, c.i2));
    else
      literals.add(charFromHex(((CPrim) c).s));
  ret new LineComped<Char, Unit>(literals, pairs, litmap(unit(), firstValue(compressor.finalEncodings)));
}