docs: @Override
      public boolean isRegistered(ObjectName name) throws IOException {
          checkConnection();
          if (name == null)
              throw new RuntimeOperationsException(new IllegalArgumentException(RESTClientMessagesUtil.getMessage(RESTClientMessagesUtil.OBJECT_NAME_NULL)));
          else if (name.isPattern())
              return false;
  
          @SuppressWarnings("unchecked")
          Set<ObjectInstance> results = queryMBeans(name, null, null, true);
          return results.size() == 1;
      }