[
    {
      "mode": "REQUIRED",
      "name": "rowindex",
      "type": "STRING"
    },
    {
      "mode": "NULLABLE",
      "name": "w",
      "type": "INTEGER"
    },
    {
      "mode": "NULLABLE",
      "name": "x",
      "type": "INTEGER"
    },
    {
      "mode": "NULLABLE",
      "name": "y",
      "type": "INTEGER"
    },
    {
      "mode": "NULLABLE",
      "name": "z",
      "type": "INTEGER"
    }
  ]