while (!utf8.exhausted()) {
      require(utf8.readByte() == '.'.code.toByte())
      val vN = utf8.readDecimalLong()
      writeVariableLengthLong(vN)
    }
  }

  fun writeRelativeObjectIdentifier(s: String) {
    // Add a leading dot so each subidentifier has a dot prefix.
    val utf8 =
      Buffer()
        .writeByte('.'.code.toByte().toInt())
        .writeUtf8(s)