{
  "a": [
    1,
    2,
    {
      "x": "y"
    },
    3,
    {
      "keep": "not in final output"
    }
  ],
  "keep": [
    1,
    null,
    2,
    false,
    "keep",
    3,
    [
      "this",
      "keep",
      "not",
      "final"
    ]
  ]
}