example-bin-prot-layout.json

[
  "Record",
  [
    { "field_name": "first", "field_rule": ["Int"] },
    { "field_name": "second", "field_rule": [
        "Record", [{ "field_name": "inner", "field_rule": ["Bool"] }] 
    ]},
    { "field_name": "third", "field_rule": [
      "Sum",
      [
        { "ctor_name": "one", "index": 0, "ctor_args": [["Int"]] },
        { "ctor_name": "two", "index": 1, "ctor_args": [["Bool"]] }
      ]
    ]}
  ]
]