// (no body)
	}
}

func ResetCachedEnvironment() {
	resetProxyConfig()
}

func (t *Transport) NumPendingRequestsForTesting() int {
	t.reqMu.Lock()
	defer t.reqMu.Unlock()
	return len(t.reqCanceler)
}

func (t *Transport) IdleConnKeysForTesting() (keys []string) {
	keys = make([]string, 0)
	t.idleMu.Lock()
	defer t.idleMu.Unlock()
	for key := range t.idleConn {
		keys = append(keys, key.String())

	// concurrency guarantees.
	cancel := func(err error) {
		origCancel(err)
		t.reqMu.Lock()
		delete(t.reqCanceler, req)
		t.reqMu.Unlock()
	}
	t.reqMu.Lock()
	if t.reqCanceler == nil {
		t.reqCanceler = make(map[*Request]context.CancelCauseFunc)
	}
	t.reqCanceler[req] = cancel
	t.reqMu.Unlock()
	return cancel
}

// CancelRequest cancels an in-flight request by closing its connection.