}

func (t *http2Transport) idleConnTimeout() time.Duration {
	// to keep things backwards compatible, we use non-zero values of
	// IdleConnTimeout, followed by using the IdleConnTimeout on the underlying
	// http1 transport, followed by 0
	if t.IdleConnTimeout != 0 {
		return t.IdleConnTimeout
	}

	if t.t1 != nil {
		return t.t1.IdleConnTimeout
	}

	return 0
}