Before:
{
  "layers": [
    {
      "name": "Scrolling background of LayoutView #document",
      "bounds": [800, 600],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV id='green-box' class='box green center composited'",
      "bounds": [100, 100],
      "contentsOpaque": true,
      "backgroundColor": "#008000",
      "transform": 2
    }
  ],
  "transforms": [
    {
      "id": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [108, 108, 0, 1]
      ]
    },
    {
      "id": 2,
      "parent": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [0, 0, -1, 1]
      ]
    }
  ]
}

After:
{
  "layers": [
    {
      "name": "Scrolling background of LayoutView #document",
      "bounds": [800, 600],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV id='green-box' class='box green center composited'",
      "bounds": [100, 100],
      "contentsOpaque": true,
      "backgroundColor": "#008000",
      "transform": 2
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV class='box top left'",
      "position": [8, 8],
      "bounds": [100, 300],
      "contentsOpaque": true,
      "backgroundColor": "#808080"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV class='box top right'",
      "position": [208, 8],
      "bounds": [100, 300],
      "contentsOpaque": true,
      "backgroundColor": "#808080"
    }
  ],
  "transforms": [
    {
      "id": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [108, 108, 0, 1]
      ]
    },
    {
      "id": 2,
      "parent": 1,
      "transform": [
        [0.707106781186548, 0.707106781186548, 0, 0],
        [-0.707106781186548, 0.707106781186548, 0, 0],
        [0, 0, 1, 0],
        [0, 0, -1, 1]
      ],
      "origin": [50, 50]
    }
  ]
}