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

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


   self_layout -> widget_t[arrowhead = "ediamond"]
   children_layout -> widget_t[arrowhead = "ediamond"]
 }