The code you're seeing is here <https://github.com/graphhopper/graphhopper/blob/master/core/src/main/java/com/graphhopper/util/InstructionList.java> and it's the current master in development.
So you'll need to choose what version you'll use in order to follow its API. (and use also graphs built with that version) -- EmuxCruiser <http://wiki.openstreetmap.org/wiki/Cruiser> - Atlas <http://wiki.openstreetmap.org/wiki/Atlas_%28navigation_application%29>
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