{
  "layers": [
    {
      "name": "LayoutView #document",
      "bounds": [800, 600],
      "drawsContent": false,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "Scrolling Layer",
      "bounds": [800, 600],
      "drawsContent": false
    },
    {
      "name": "Scrolling Contents Layer",
      "bounds": [800, 600],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF",
      "paintInvalidations": [
        {
          "object": "LayoutNGBlockFlow (positioned) DIV id='child'",
          "rect": [300, 50, 20, 300],
          "reason": "geometry"
        },
        {
          "object": "LayoutNGBlockFlow (positioned) DIV id='child'",
          "rect": [150, 50, 20, 300],
          "reason": "geometry"
        }
      ]
    }
  ]
}