assertThat(c1.socket().isClosed).isFalse()
    assertThat(c2.socket().isClosed).isFalse()

    // Add a third connection
    val c3 = factory.newConnection(pool, routeC1, 75L)

    // The third connection bounces the first.
    assertThat(pool.closeConnections(100L)).isEqualTo(0L)
    assertThat(pool.connectionCount()).isEqualTo(2)
    assertThat(c1.socket().isClosed).isTrue()

 *     Reference<?> reference = new FinalizablePhantomReference<MyServer>(myServer, frq) {
 *       public void finalizeReferent() {
 *         references.remove(this):
 *         if (!serverSocket.isClosed()) {
 *           ...log a message about how nobody called close()...
 *           try {
 *             serverSocket.close();
 *           } catch (IOException e) {
 *             ...
 *           }
 *         }

		defer c.connMu.Unlock()
		c.clientPingInterval = args[0].(time.Duration)
	case debugAddToDeadline:
		c.addDeadline = args[0].(time.Duration)
	case debugIsOutgoingClosed:
		// params: muxID uint64, isClosed func(bool)
		muxID := args[0].(uint64)
		resp := args[1].(func(b bool))
		mid, ok := c.outgoing.Load(muxID)
		if !ok || mid == nil {
			resp(true)
			return
		}
		mid.respMu.Lock()