Adjusted demo to include a call to `to_json()`.
Adjusted demo to include a call to `to_json()`.

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