* [Call.request] is a redirect to a different address.
   */
  open fun requestBodyStart(call: Call) {
  }

  /**
   * Invoked immediately after sending a request body.
   *
   * This method is always invoked after [requestBodyStart].
   */
  open fun requestBodyEnd(
    call: Call,
    byteCount: Long,
  ) {
  }

  /**

import okhttp3.CallEvent.DnsEnd
import okhttp3.CallEvent.DnsStart
import okhttp3.CallEvent.FollowUpDecision
import okhttp3.CallEvent.ProxySelectEnd
import okhttp3.CallEvent.ProxySelectStart
import okhttp3.CallEvent.RequestBodyStart
import okhttp3.CallEvent.RequestFailed
import okhttp3.CallEvent.RequestHeadersEnd
import okhttp3.CallEvent.RequestHeadersStart
import okhttp3.CallEvent.ResponseBodyEnd
import okhttp3.CallEvent.ResponseBodyStart

import okhttp3.CallEvent.DnsStart
import okhttp3.CallEvent.FollowUpDecision
import okhttp3.CallEvent.ProxySelectEnd
import okhttp3.CallEvent.ProxySelectStart
import okhttp3.CallEvent.RequestBodyEnd
import okhttp3.CallEvent.RequestBodyStart
import okhttp3.CallEvent.RequestFailed
import okhttp3.CallEvent.RequestHeadersEnd
import okhttp3.CallEvent.RequestHeadersStart
import okhttp3.CallEvent.ResponseBodyEnd
import okhttp3.CallEvent.ResponseBodyStart

  fun createRequestBody(
    request: Request,
    duplex: Boolean,
  ): Sink {
    this.isDuplex = duplex
    val contentLength = request.body!!.contentLength()
    call.eventListener.requestBodyStart(call)
    val rawRequestBody = codec.createRequestBody(request, contentLength)
    return RequestBodySink(
      delegate = rawRequestBody,
      contentLength = contentLength,
      isSocket = false,
    )
  }

        ),
      ).assertLogMatch(Regex("""requestHeadersStart"""))
      .assertLogMatch(Regex("""requestHeadersEnd"""))
      .assertLogMatch(Regex("""requestBodyStart"""))
      .assertLogMatch(Regex("""requestBodyEnd: byteCount=6"""))
      .assertLogMatch(Regex("""responseHeadersStart"""))

        override fun requestHeadersStart(call: Call) = TODO()

        override fun requestHeadersEnd(
          call: Call,
          request: Request,
        ) = TODO()

        override fun requestBodyStart(call: Call) = TODO()

        override fun requestBodyEnd(
          call: Call,
          byteCount: Long,
        ) = TODO()

        override fun requestFailed(
          call: Call,