sink.writeUtf8("-------\n");
        for (int i = 2; i <= 997; i++) {
          sink.writeUtf8(String.format(" * %s = %s\n", i, factor(i)));
        }
      }

      private String factor(int n) {
        for (int i = 2; i < n; i++) {
          int x = n / i;
          if (x * i == n) return factor(x) + " × " + i;
        }
        return Integer.toString(n);
      }
    };

    Request request = new Request.Builder()

          sink.writeUtf8("-------\n")
          for (i in 2..997) {
            sink.writeUtf8(String.format(" * $i = ${factor(i)}\n"))
          }
        }

        private fun factor(n: Int): String {
          for (i in 2 until n) {
            val x = n / i
            if (x * i == n) return "${factor(x)} × $i"
          }
          return n.toString()
        }
      }

    val request =
      Request(

            sink.writeUtf8(String.format(" * %s = %s\n", i, factor(i)));
          }
          sink.close();
        } catch (IOException | InterruptedException e) {
          e.printStackTrace();
        }
      }

      private String factor(int n) {
        for (int i = 2; i < n; i++) {
          int x = n / i;
          if (x * i == n) return factor(x) + " × " + i;
        }
        return Integer.toString(n);

0001 0.624 responseBodyEnd
0001 0.624 connectionReleased
0001 0.624 callEnd
```

The `EventListener.Factory` also makes it possible to limit metrics to a subset of calls. This one captures metrics on a random 10%:

```java
class MetricsEventListener extends EventListener {
  private static final Factory FACTORY = new Factory() {
    @Override public EventListener create(Call call) {
      if (Math.random() < 0.10) {

    level = DeprecationLevel.HIDDEN,
  )
  @JvmStatic
  fun createFactory(client: OkHttpClient) = createFactory(client as Call.Factory)

  @JvmStatic
  fun createFactory(callFactory: Call.Factory): EventSource.Factory {
    return EventSource.Factory { request, listener ->
      val actualRequest =
        if (request.header("Accept") == null) {

	public static synthetic fun androidLogging$default (Lokhttp3/logging/HttpLoggingInterceptor$Companion;ILjava/lang/String;ILjava/lang/Object;)Lokhttp3/logging/HttpLoggingInterceptor;
	public static synthetic fun androidLogging$default (Lokhttp3/logging/LoggingEventListener$Companion;ILjava/lang/String;ILjava/lang/Object;)Lokhttp3/logging/LoggingEventListener$Factory;

      sslParameters.applicationProtocols = Platform.alpnProtocolNames(protocols).toTypedArray()

      bcSocket.parameters = sslParameters
    }
  }

  companion object {
    val factory =
      object : DeferredSocketAdapter.Factory {
        override fun matchesSocket(sslSocket: SSLSocket): Boolean {
          return BouncyCastlePlatform.isSupported && sslSocket is BCSSLSocket
        }

  var client: Call.Factory? = null

  override fun run() {
    LoggingUtil.configureLogging(debug = verbose, showHttp2Frames = showHttp2Frames, sslDebug = sslDebug)

    commonRun()
  }

  fun createRequest(): Request = commonCreateRequest()

  fun createClient(): Call.Factory {
    val builder = OkHttpClient.Builder()
    builder.followSslRedirects(followRedirects)

      assertThat(response.exchangeAccessor!!.connectionAccessor.socket())
        .isInstanceOf<SSLSocketImpl>()
    }
  }

  @Test
  fun testSupportedProtocols() {
    val factory = SSLSocketFactoryImpl()
    val s = factory.createSocket() as SSLSocketImpl

    assertEquals(listOf("TLSv1.3", "TLSv1.2"), s.enabledProtocols.toList())
  }

  @Test
  @Disabled
  fun testMozilla() {
    assumeNetwork()

  /**
   * Immediately and violently release resources held by this event source. This does nothing if
   * the event source has already been closed or canceled.
   */
  fun cancel()

  fun interface Factory {
    /**
     * Creates a new event source and immediately returns it. Creating an event source initiates an
     * asynchronous process to connect the socket. Once that succeeds or fails, `listener` will be