val rangesLimit =
      when {
        sectionsIndex + 4 < sections.length -> sections.read14BitInt(sectionsIndex + 6)
        else -> ranges.length / 4
      }

    val rangesIndex = findRangesOffset(codePoint, rangesPosition, rangesLimit)

    when (val b1 = ranges[rangesIndex + 1].code) {
      in 0..63 -> {
        // Length of the UTF-16 sequence that this range maps to. The offset is b2b3.