[GraphHopper] Android: Unload graph

[emux]

Peter is there a way to check if GH has a graph loaded?

I see methods like getGraphHopperLocation, getGraph, getLocationIndex
but I think that their values do not get null with GH.close().
e.g. the 'fullyLoaded' variable is hidden

-- 
Emux
Cruiser <http://wiki.openstreetmap.org/wiki/Cruiser> - Atlas 
<http://wiki.openstreetmap.org/wiki/Atlas_%28navigation_application%29>
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