Isochrone polygon examples

Iam using graphhopper-core 10.0 but it doesnt have the correct examples for isochrone. Isoschrone example should return the isochrone polygon (boundary vertices)

Did you take a look at IsochroneExample.java? You either need to clone the source code directly, or if you want to import it from Maven include the graphhopper-examples artifact (the examples are not located in graphhopper-core).

And yes, the IsochroneExample.java does not show how to build the isoline. You can see how this is done in IsochroneResource.java. Feel free to add the isoline building to the isochrone example and provide a PR as this would probably be useful for others as well.