try {
            return new URI(uri);
        } catch (URISyntaxException e) {
            throw UncheckedException.throwAsUncheckedException(e);
        }
    }

    public static List<URI> getOrDefaults(List<URI> uris) {
        if (uris.isEmpty()) {
            return DEFAULT_KEYSERVERS;
        }
        return uris;
    }

    }

    private List<URI> keyServers() {
        return DefaultKeyServers.getOrDefaults(verifier.getConfiguration().getKeyServers());
    }

    @Override

        SignatureVerificationService signatureVerificationService = signatureVerificationServiceFactory.create(
            existingKeyring,
            DefaultKeyServers.getOrDefaults(verificationsBuilder.getKeyServers()),
            !offline
        );
        if (!verificationsBuilder.isUseKeyServers() && !offline) {