public static Mapping getJenkinsRoot(ConfigurationContext context) throws Exception {
        JenkinsConfigurator root = getJenkinsConfigurator();

        return Objects.requireNonNull(root.describe(root.getTargetComponent(context), context))
                .asMapping();
    }
Gets the "jenkins" root mapping.
<p>
Example usage:
<pre>{@code
ConfiguratorRegistry registry = ConfiguratorRegistry.get();
ConfigurationContext context = new ConfigurationContext(registry);
CNode configNode = getJenkinsRoot(context).get("nodes");}</pre>

@param context the configuration context
@return the "jenkins" root mapping
@throws Exception something's not right...
test-harness/src/main/java/io/jenkins/plugins/casc/misc/Util.java