Added 'allow_subclasses' keyword option
Added 'allow_subclasses' keyword option

ee08b397/schematics,promptworks/schematics,kstrauser/schematics,NerdWallet/schematics,not-napoleon/schematics,eatfirst/schematics,promptworks/schematics,kstrauser/schematics,openprocurement/schematics,kaiix/schematics,ee08b397/schematics,not-napoleon/schematics,mlyundin/schematics