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1. Add a new method that will implement the edge routing using the following skeleton code:

   Code Block
   language java
   /** * Routes the edges connecting the nodes in the given graph. * * @param parentNode the graph whose edges to route. * @return height used for edge routing. */ private float routeEdges(final KNode parentNode) { // TODO: Implement edge routing return 0; }

2. Add a call to routeEdges(...) in your doLayout(...) method and implement the latter.

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