{
  node(id: "Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0LzYxOTc2OTU1NzgyOTk=") {
    ... on Product {
      id
      variantBySelectedOptions(selectedOptions: [{name: "Size", value: "Full/Queen"}, {name: "Color", value: "Sienna"}])
    }
  }
}

{
  "errors": [
    {
      "message": "Field 'variantBySelectedOptions' doesn't exist on type 'Product'",
      "locations": [
        {
          "line": 5,
          "column": 7
        }
      ],
      "path": [
        "query",
        "node",
        "... on Product",
        "variantBySelectedOptions"
      ],
      "extensions": {
        "code": "undefinedField",
        "typeName": "Product",
        "fieldName": "variantBySelectedOptions"
      }
    }
  ]
}