onRoadGraphDataUpdateInfoAvailable      
  abstract fun onRoadGraphDataUpdateInfoAvailable(isUpdateAvailable: Boolean, versionInfo: RoadGraphVersionInfo?)
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Invoked when the information about available road graph data updates is received.
Parameters
isUpdateAvailable  
true if new version of road graph data is available, false otherwise.
versionInfo 
information about the new version. Can be null if no information is available.