}
	if out.Authority == nil {
		out.Authority = root.Authority
	}
	// headers
	out.Headers = maps.MergeCopy(root.Headers, delegate.Headers)

	// withoutheaders
	out.WithoutHeaders = maps.MergeCopy(root.WithoutHeaders, delegate.WithoutHeaders)

	// queryparams
	out.QueryParams = maps.MergeCopy(root.QueryParams, delegate.QueryParams)

	if out.Port == 0 {
		out.Port = root.Port
	}

		{name: "exact without headers match", route: &networking.HTTPRoute{
			Redirect: &networking.HTTPRedirect{
				Uri:       "/",
				Authority: "foo.biz",
			},
			Match: []*networking.HTTPMatchRequest{{
				WithoutHeaders: map[string]*networking.StringMatch{
					"header": {
						MatchType: &networking.StringMatch_Exact{Exact: "test"},
					},
				},
			}},
		}, valid: true},