test-fixtures/index/isMU/01/metadata.json
{
"description": "isMU: true",
"skip": false,
"input": {
"leader": "01234cjm a22005894i 4500",
"fields":
[
{"tag": "001", "value": "bar"}
]
},
"operations": [
{ "name": "isTypeOfMaterial", "args": {"self": true, "target": "MU"}}
],
"returns": true,
"immutable": true,
"only": false
}