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)