Improves serializer and don't serialize items that are already in root
Improves serializer and don't serialize items that are already in root

golozubov/freefeed-server,golozubov/freefeed-server,davidmz/pepyatka-server,pepyatka/pepyatka-server,SiTLar/freefeed-server,SiTLar/freefeed-server,FreeFeed/freefeed-server,FreeFeed/freefeed-server