// clientConnIdleState describes the suitability of a client
// connection to initiate a new RoundTrip request.
type http2clientConnIdleState struct {
	canTakeNewRequest bool
}

func (cc *http2ClientConn) idleState() http2clientConnIdleState {
	cc.mu.Lock()
	defer cc.mu.Unlock()
	return cc.idleStateLocked()
}

func (cc *http2ClientConn) idleStateLocked() (st http2clientConnIdleState) {