object : ForwardingResponseBody(response.body) {
        override fun source(): BufferedSource {
          return uppercaseSource(delegate().source()).buffer()
        }
      }
    return response.newBuilder()
      .body(uppercaseBody)
      .build()
  }

  private fun uppercaseSource(source: BufferedSource): ForwardingSource {
    return object : ForwardingSource(source) {
      @Throws(IOException::class)