/** Returns the HTTP response line, such as "HTTP/1.1 200 OK". */
  val status: String

  val code: Int
    get() {
      val statusParts = status.split(' ', limit = 3)
      require(statusParts.size >= 2) { "Unexpected status: $status" }
      return statusParts[1].toInt()
    }

  val message: String
    get() {
      val statusParts = status.split(' ', limit = 3)

  private var trailersBuilder = Headers.Builder()

  @set:JvmName("headers")
  var headers: Headers
    get() = headersBuilder.build()
    set(value) {
      this.headersBuilder = value.newBuilder()
    }

  @set:JvmName("trailers")
  var trailers: Headers
    get() = trailersBuilder.build()
    set(value) {
      this.trailersBuilder = value.newBuilder()
    }

  private var body: Buffer? = null