test-fixtures/marcFieldSortBackup/04/input.json
{
"leader": "",
"fields":
[
{"tag": "650", "ind1": " ", "ind2": " ", "subfields": [{"code": "y", "value": "B"}] },
{"tag": "650", "ind1": " ", "ind2": " ", "subfields": [{"code": "y", "value": "C"}] },
{"tag": "650", "ind1": " ", "ind2": " ", "subfields": [{"code": "y", "value": "A"}] },
{"tag": "650", "ind1": " ", "ind2": " ", "subfields": [{"code": "y", "value": "D"}] }
]
}