@Restricted(NoExternalUse.class)
    @NonNull
    public String getHtmlHelp(Class type, String attribute) throws IOException {
        final URL resource = Klass.java(type).getResource("help-" + attribute + ".html");
        if (resource != null) {
            return IOUtils.toString(resource.openStream(), StandardCharsets.UTF_8);
        }
        return "";
    }
Retrieve the html help tip associated to an attribute, used in documentation.jelly
FIXME would prefer &lt;st:include page="help-${a.name}.html" class="${c.target}" optional="true"/&gt;
@param attribute to get help for
@return String that shows help. May be empty
@throws IOException if the resource cannot be read
plugin/src/main/java/io/jenkins/plugins/casc/ConfigurationAsCode.java