index: Int,
      pathSegment: String,
    ) = apply {
      val canonicalPathSegment = pathSegment.canonicalize(encodeSet = PATH_SEGMENT_ENCODE_SET)
      require(!isDot(canonicalPathSegment) && !isDotDot(canonicalPathSegment)) {
        "unexpected path segment: $pathSegment"
      }
      encodedPathSegments[index] = canonicalPathSegment
    }

    fun setEncodedPathSegment(
      index: Int,