g.Expect(r.RequestHeadersToAdd).To(Equal([]*envoycore.HeaderValueOption{
			{
				Header: &envoycore.HeaderValue{
					Key:   "x-req-set",
					Value: "v1",
				},
				AppendAction: envoycore.HeaderValueOption_OVERWRITE_IF_EXISTS_OR_ADD,
			},
			{
				Header: &envoycore.HeaderValue{
					Key:   "x-req-add",
					Value: "v2",
				},

	}
	headerVal := strings.Join(valParts, ", ")
	return &core.HeaderValueOption{
		AppendAction: core.HeaderValueOption_APPEND_IF_EXISTS_OR_ADD,
		Header: &core.HeaderValue{
			Key:   util.AltSvcHeader,
			Value: headerVal,
		},
	}
}

// SortHeaderValueOption type and the functions below (Len, Less and Swap) are for sort.Stable for type HeaderValueOption