layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (0,0) size 800x600
      RenderSVGRoot {svg} at (0,0) size 200x100
        RenderSVGHiddenContainer {defs} at (0,0) size 0x0
          RenderSVGResourceMasker {mask} [id="mask"] [maskUnits=objectBoundingBox] [maskContentUnits=userSpaceOnUse]
            RenderSVGRect {rect} at (0,0) size 200x50 [fill={[type=SOLID] [color=#FFFFFF]}] [x=0.00] [y=0.00] [width=200.00] [height=50.00]
        RenderSVGForeignObject {foreignObject} at (0,0) size 200x100
          RenderBlock {DIV} at (0,0) size 200x50 [bgcolor=#008000]
          RenderBlock {DIV} at (0,50) size 200x50 [bgcolor=#FF0000]
      RenderText {#text} at (0,0) size 0x0