RelayCodeGenerator: Complex argument values (Lists or InputObjects with nested variables) are not supported, argument

filter

had value

{
  "kind": "ObjectValue",
  "metadata": null,
  "fields": [
    {
      "kind": "ObjectFieldValue",
      "metadata": null,
      "name": "project",
      "value": {
        "kind": "ObjectValue",
        "metadata": null,
        "fields": [
          {
            "kind": "ObjectFieldValue",
            "metadata": null,
            "name": "id",
            "value": {
              "kind": "Variable",
              "metadata": null,
              "variableName": "proj_id"
            }
          }
        ]
      }
    }
  ]
}

. Source: document undefined.