[
  {
    "description": "items: async + sync",
    "schema": {
      "$async": true,
      "items": [
        {
          "type": "integer",
          "idExists": { "table": "users" }
        },
        {
          "type": "integer"
        },
        {
          "type": "integer",
          "idExists": { "table": "users" }
        }
      ]
    },
    "tests": [
      {
        "description": "valid array",
        "data": [ 1, 2, 5 ],
        "valid": true
      },
      {
        "description": "another valid array",
        "data": [ 5, 2, 8 ],
        "valid": true
      },
      {
        "description": "invalid 1st async item",
        "data": [ 9, 2, 8 ],
        "valid": false
      },
      {
        "description": "invalid 2nd async item",
        "data": [ 1, 2, 9 ],
        "valid": false
      },
      {
        "description": "invalid sync item",
        "data": [ 1, "abc", 5 ],
        "valid": false
      }
    ]
  }
]