{
  "bounds": [800, 600],
  "children": [
    {
      "bounds": [800, 600],
      "contentsOpaque": true,
      "drawsContent": true,
      "backgroundColor": "#C0C0C0",
      "repaintRects": [
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      "paintInvalidationClients": [
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        "LayoutView #document",
        "LayoutBlockFlow HTML",
        "LayoutBlockFlow BODY",
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        "LayoutText #text",
        "InlineTextBox 'scroll me'",
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}