response only if the response code is HTTP/1.1 304 Not Modified.

 - CallStart
 - **CacheConditionalHit**
 - ConnectionAcquired
 - ... Standard Events...
 - ResponseBodyEnd _(0 bytes)_
 - **CacheHit**
 - ConnectionReleased
 - CallEnd

## Cache directory

The cache directory must be exclusively owned by a single instance.

      for (delegate in eventListeners) {
        delegate.responseBodyStart(call)
      }
    }

    override fun responseBodyEnd(
      call: Call,
      byteCount: Long,
    ) {
      for (delegate in eventListeners) {
        delegate.responseBodyEnd(call, byteCount)
      }
    }

    override fun responseFailed(
      call: Call,
      ioe: IOException,
    ) {

import okhttp3.CallEvent.ProxySelectEnd
import okhttp3.CallEvent.ProxySelectStart
import okhttp3.CallEvent.RequestHeadersEnd
import okhttp3.CallEvent.RequestHeadersStart
import okhttp3.CallEvent.ResponseBodyEnd
import okhttp3.CallEvent.ResponseBodyStart
import okhttp3.CallEvent.ResponseHeadersEnd
import okhttp3.CallEvent.ResponseHeadersStart
import okhttp3.EventRecorder
import okhttp3.Headers

  }

  data class ResponseBodyStart(
    override val timestampNs: Long,
    override val call: Call,
  ) : CallEvent()

  data class ResponseBodyEnd(
    override val timestampNs: Long,
    override val call: Call,
    val bytesRead: Long,
  ) : CallEvent() {
    override fun closes(event: CallEvent): Boolean = event is ResponseBodyStart && call == event.call

        override fun responseHeadersEnd(
          call: Call,
          response: Response,
        ) = TODO()

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

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

        override fun responseFailed(
          call: Call,
          ioe: IOException,
        ) = TODO()

import okhttp3.CallEvent.RequestBodyEnd
import okhttp3.CallEvent.RequestBodyStart
import okhttp3.CallEvent.RequestHeadersEnd
import okhttp3.CallEvent.RequestHeadersStart
import okhttp3.CallEvent.ResponseBodyEnd
import okhttp3.CallEvent.ResponseBodyStart
import okhttp3.CallEvent.ResponseFailed
import okhttp3.CallEvent.ResponseHeadersEnd
import okhttp3.CallEvent.ResponseHeadersStart
import okhttp3.CallEvent.RetryDecision

	public fun requestFailed (Lokhttp3/Call;Ljava/io/IOException;)V
	public fun requestHeadersEnd (Lokhttp3/Call;Lokhttp3/Request;)V
	public fun requestHeadersStart (Lokhttp3/Call;)V
	public fun responseBodyEnd (Lokhttp3/Call;J)V
	public fun responseBodyStart (Lokhttp3/Call;)V
	public fun responseFailed (Lokhttp3/Call;Ljava/io/IOException;)V
	public fun responseHeadersEnd (Lokhttp3/Call;Lokhttp3/Response;)V

    This is most useful when writing the request body is destructive.

 *  New: We've added `requestFailed()` and `responseFailed()` methods to `EventListener`. These
    are called instead of `requestBodyEnd()` and `responseBodyEnd()` in some failure situations.
    They may also be fired in cases where no event was published previously. In this release we did
    an internal rewrite of our event code to fix problems where events were lost or unbalanced.

	public fun requestFailed (Lokhttp3/Call;Ljava/io/IOException;)V
	public fun requestHeadersEnd (Lokhttp3/Call;Lokhttp3/Request;)V
	public fun requestHeadersStart (Lokhttp3/Call;)V
	public fun responseBodyEnd (Lokhttp3/Call;J)V
	public fun responseBodyStart (Lokhttp3/Call;)V
	public fun responseFailed (Lokhttp3/Call;Ljava/io/IOException;)V
	public fun responseHeadersEnd (Lokhttp3/Call;Lokhttp3/Response;)V