// Skip comment and empty lines.
    when (select(optionsDelimiter)) {
      DELIMITER_HASH -> {
        skipRestOfLine()
        continue
      }

      DELIMITER_NEWLINE -> {
        continue
      }

      DELIMITER_DOT, DELIMITER_SPACE, DELIMITER_SEMICOLON -> {
        throw IOException("unexpected delimiter")
      }
    }

    // "002F" or "0000..002C"