How to get the node's info(Coordinates) of Isochrone via Java API?

Hi guys!

I used graphhopper V3.0-pre1 to calculate Isochrone polygon,referenced this example:IsochroneExample.java. But this example only gives the index of node not coordinate, like this:

node: 1473, time: 58779, distance: 681.8787185771592
node: 477, time: 59192, distance: 863.7387185771594
node: 1464, time: 59421, distance: 676.9057185771593

if I want to get a set of coordinates of Isochrone polygon, what should I do? ?

need help,please!

queryGraph.getNodeAccess().getLat/Lon/Ele(label.node)