### Question:
RxtUnboundedFieldManagerService extends AbstractAdmin { public static RxtUnboundedFieldManagerService getInstance() { return rxtUnboundedFieldManagerServiceInstance; }  static RxtUnboundedFieldManagerService getInstance(); Map<Integer, Map<String, List<String>>> getTenantsUnboundedFields(); void setActiveTenantsUnboundedFields(String rxtConfig); void setTenantsUnboundedFields(Integer tenantId, Map<String, List<String>> rxtUnboundedFiledMap);  }### Answer:
@Test public void getInstance() throws Exception { Object object = RxtUnboundedFieldManagerService.getInstance(); assertTrue(object instanceof RxtUnboundedFieldManagerService); }