Also, is there a replacement for helper? I see there is an [identityKeys](https://github.com/canjs/can-query-logic/blob/7931b4d3c8c23e0821cc3d984c1f0233d3e92681/can-query-logic.js#L98-L100) method in queryLogic but the commented out warning makes me think it might not be smart to use it? @justinbmeyer