return nil, err
		}
		if cc.ReserveNewRequest() {
			return cc, nil
		}
	}
}

// dialCall is an in-flight Transport dial call to a host.
type http2dialCall struct {
	_ http2incomparable
	p *http2clientConnPool
	// the context associated with the request
	// that created this dialCall
	ctx  context.Context
	done chan struct{}    // closed when done