example.dot

    digraph xtext {
    fontname = "Bitstream Vera Sans"
    fontsize = 8
    node[
        shape=record,
        style=filled,
        fillcolor=aliceblue
    ]
    nodesep = 0.3
    edge[dir=black,arrowtail=empty]


1029343684480 -> 1029343769544 [label="to_greet:0" arrowtail=diamond dir=both]
1029343769544[label="{World:Who|}"]
1029343684480 -> 1029343769600 [label="to_greet:1" arrowtail=diamond dir=both]
1029343769600[label="{Solar System:Who|}"]
1029343684480 -> 1029343769712 [label="to_greet:2" arrowtail=diamond dir=both]
1029343769712[label="{Universe:Who|}"]
1029343684480[label="{:HelloWordlModel|}"]

}