@Override
            public String getValue(final LogContext context) {
                final String nestedTemplate = Settings.getSignature();
                if (StringUtils.contains(nestedTemplate, "SIGNATURE")) {
                    return "invalid signature template";
                }
                return applyTemplates(nestedTemplate, context);
            }
@return all user-facing templates, including the signature template
main/src/main/java/cgeo/geocaching/log/LogTemplateProvider.java