docs: public static void addOperation(final OperationContext context) {
          RbacSanityCheckOperation added = context.getAttachment(KEY);
          if (added == null) {
              // TODO support managed domain
              if (!context.isNormalServer()) return;
              context.addStep(createOperation(), INSTANCE, Stage.MODEL);
              context.attach(KEY, INSTANCE);
          }
      }