{
  "layers": [
    {
      "name": "Scrolling background of LayoutView #document",
      "bounds": [800, 600],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF",
      "invalidations": [
        [420, 20, 100, 100],
        [220, 20, 100, 100],
        [20, 140, 100, 100]
      ]
    },
    {
      "name": "LayoutBlockFlow (positioned) DIV id='target3'",
      "position": [420, 20],
      "bounds": [100, 100],
      "contentsOpaque": true,
      "backgroundColor": "#0000FF"
    }
  ]
}