if in == nil {
		return out
	}

	for name, stringMatch := range in.Headers {
		// The metadata matcher takes precedence over the header matcher.
		if metadataMatcher := translateMetadataMatch(name, stringMatch, useExtendedJwt); metadataMatcher != nil {
			out.DynamicMetadata = append(out.DynamicMetadata, metadataMatcher)
		} else {
			matcher := translateHeaderMatch(name, stringMatch)

			useExtended: true,
		},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			got := translateMetadataMatch(tc.name, tc.in, tc.useExtended)
			if !reflect.DeepEqual(got, tc.want) {
				t.Errorf("Unexpected metadata matcher want %v, got %v", tc.want, got)
			}
		})
	}
}