[
    {
      "mode": "REQUIRED",
      "name": "rowindex",
      "type": "INTEGER"
    },
    {
      "mode": "NULLABLE",
      "name": "a",
      "type": "INTEGER"
    },
    {
      "mode": "NULLABLE",
      "name": "b",
      "type": "INTEGER"
    },
    {
      "mode": "NULLABLE",
      "name": "c",
      "type": "INTEGER"
    }
  ]