oxigraph/testsuite/oxigraph-tests/sparql-results/ignored_keys.srj

{
  "head": {
    "vars": ["s"],
    "custom": null
  },
  "results": {
    "custom": {"foo": [true, false]},
    "bindings": [
      {
        "s": {
          "type": "uri",
          "value": "http://example.org/s1"
        }
      }
    ]
  }
}