test-fixtures/remove-inferior-datafields/f06/expectedResult.json
{
"_validationOptions": {},
"fields": [
{ "tag": "001", "value": "f01" },
{ "tag": "600", "ind1": "1", "ind2": "4", "subfields": [
{ "code": "6", "value": "880-01"},
{ "code": "a", "value": "Tolkien, Royd."}
]},
{ "tag": "880", "ind1": "1", "ind2": " ", "subfields": [
{ "code": "6", "value": "600-01"},
{ "code": "a", "value": "whatever"}
]}
],
"leader": ""
}