code: protected final void registerStandardExtensions() {
                  register(XConceptExtension.instance());
                  register(XTimeExtension.instance());
                  register(XLifecycleExtension.instance());
                  register(XOrganizationalExtension.instance());
                  register(XSemanticExtension.instance());
          }
docs: Registers all defined standard extensions with the extension manager
  before caching.