{"name":"mug","price":9.99,"discount":null,"blob":"aGk="}
9.99
0.25
hi
{"name":"mug","price":9.99,"discount":0.25,"blob":"aGk="}
0.0025 0
null discount read back as nil
42.0
int fraction still rejected
{"name":"inf","price":null,"discount":null,"blob":""}