errs = appendErrors(errs, validateStringMatchRegexp(match.GetUri(), "uri"))
			errs = appendErrors(errs, validateStringMatch(match.GetScheme(), "scheme"))
			errs = appendErrors(errs, validateStringMatch(match.GetMethod(), "method"))
			errs = appendErrors(errs, validateStringMatch(match.GetAuthority(), "authority"))
			for _, qp := range match.GetQueryParams() {
				errs = appendErrors(errs, validateStringMatch(qp, "queryParams"))

        formatter.endChildren();
    }

    private String toMessage(String key, SignatureError value) {
        StringBuilder sb = new StringBuilder();
        appendError(key, value, sb);
        return sb.toString();
    }

    private void appendError(String keyId, SignatureError error, StringBuilder sb) {
        sb.append("Artifact was signed with key '").append(keyId).append("' ");
        PGPPublicKey publicKey = error.publicKey;