$type: Sizer
name:

width:
height:
orientation:
rtl:
space:
    left:
    right:
    top:
    bottom:
    item:

draggable:

# Relace child data by game objct
background:
    - $child:
          $type:
          # ...  
      padding:
          left:
          right:
          top:
          bottom:
children:
    - $child:
          $type:
          # ...  
      proportion:
      align:
      padding:
          left:
          right:
          top:
          bottom:
      expand:
      key:
      minWidth:
      minHeight: