use an ADT instead of BackendSpecificUpdate
use an ADT instead of BackendSpecificUpdate

mitchellwrosen/persistent,jasonzoladz/persistent,andrewthad/persistent,superduper/persistent,meteficha/persistent,gbwey/persistent,mitchellwrosen/persistent,rdnetto/persistent,yesodweb/persistent,superduper/persistent,andrewthad/persistent,jasonzoladz/persistent,mkscrg/persistent,psibi/persistent,superduper/persistent,mkscrg/persistent,pseudonom/persistent,jcristovao/persistent,andrewthad/persistent,gbwey/persistent,greydot/persistent,erikd/persistent,mitchellwrosen/persistent,creichert/persistent,gbwey/persistent,meteficha/persistent,rdnetto/persistent,paul-rouse/persistent,jasonzoladz/persistent,bitemyapp/persistent,greydot/persistent,naushadh/persistent,junjihashimoto/persistent,junjihashimoto/persistent,nakaji-dayo/persistent,meteficha/persistent,nakaji-dayo/persistent,mkscrg/persistent,pseudonom/persistent,jcristovao/persistent,jcristovao/persistent,nakaji-dayo/persistent,plow-technologies/persistent,greydot/persistent