[yellowflash]

Actually it's pretty elegant by itself, Consider this all traversals are same,

val someDS;

while(!someDS.isEmpty()){

  addChildren(someDS.pop()) 

}

Now replace, someDs with

Queue -> BFS

Stack -> DFS

Priority Queue, with priority of distance so far -> Dijkstra.

Priority Queue, with distance + heuristic -> A*

Its beautiful.