digraph G { 
   
    rankdir  = BT
    fontname = "Courier New"
    fontsize = 12

    node [
        fontname = "Courier New"
        fontsize = 12
        shape    = "record"
        width = 0.4 
    ]   

   subgraph clusterFontManager{
    self_layouter_default -> self_layouter[constraint=false arrowhead=normal]
   }

   self_layouter_default -> self_layouter[style=dashed arrowhead=empty]
   self_layouter_menu -> self_layouter[style=dashed arrowhead=empty]
   self_layouter_flex -> self_layouter[style=dashed arrowhead=empty]
   self_layouter_xxx -> self_layouter[style=dashed arrowhead=empty]
 }