func net/http/httputil.upgradeType

4 uses

	net/http/httputil (current package)
		reverseproxy.go#L477: 	reqUpType := upgradeType(outreq.Header)
		reverseproxy.go#L813: func upgradeType(h http.Header) string {
		reverseproxy.go#L821: 	reqUpType := upgradeType(req.Header)
		reverseproxy.go#L822: 	resUpType := upgradeType(res.Header)