[
  {
    "input": null,
    "output": {
      "foo": null,
    },
    "states": ["Hello", "Goodbye"],
  },

  {
    "input": {
      "object": {
        "array": [1, 2, 3],
        "number": 42
      }
    },
    "output": {
      "foo": null,
    },
    "states": ["Hello", "Goodbye"],
  },

  {
    "input": "string as input",
    "output": {
      "foo": null,
    },
    "states": ["Hello", "Goodbye"],
  },
]