digraph TopLevel {
    label = "TopLevel"
    compound = true
    fontname = Arial
    fontsize = 8
    bgcolor = lightcyan1
    node [
        color = black,
        fontname = Arial,
        fontsize = 8
    ]

    ProtocolStack [
        fontcolor = black,
        shape = ellipse,
        URL = "classes/ProtocolStack.html",
        color = palegoldenrod,
        style = filled,
        label = "ProtocolStack"
    ]

}