columns {
  name: "constraints"
  type {
    type_id: JSON
  }
}
rows {
  items {
    text_value: "{\n  \"Empty\":true,\n  \"Sorted\":\n    [\n      [\n        \"subkey\",\n        true\n      ],\n      [\n        \"key\",\n        false\n      ]\n    ]\n}"
  }
}
