{
  "title": "test",
  "textColor": "1F00F0",
  "controlsColor": "FFFFFF" ,
  "unpressedColor": "F0F0FF",
  "rootControl": 
    { "type": "sizer",
      "orientation": "vertical",
      "proportions": [0.1,0.3,0.6],
      "controls": [
       { "type": "label"
       , "name": "lb3"
       , "label": "blah"
       }
      ,{ "type": "button"
       , "name": "b1"
       }
      ,{ "type": "slider"
       , "orientation": "horizontal"
       , "name": "hs2"
       }
      ]
    }
}