trace_processor/profiling/heap_graph_superclass.out

"id","superclass_id","name","superclass_name","location"
0,"[NULL]","java.lang.Class<java.lang.Object>","[NULL]","l1"
1,"[NULL]","java.lang.Class<MySuperClass>","[NULL]","l1"
2,"[NULL]","java.lang.Class<MyChildClass>","[NULL]","l2"
3,"[NULL]","java.lang.Object","[NULL]","l1"
4,3,"MySuperClass","java.lang.Object","l1"
5,4,"MyChildClass","MySuperClass","l2"