add
open fun addOnRouteChangedListener(listener: TravelbookManager.TripListener)
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Add a TripListener to TravelbookManager to subscribe to trips event(s).
open fun addOnRouteChangedListener(listener: TravelbookManager.TripListener, @Nullable() executor: Executor)
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Add a TripListener to TravelbookManager to subscribe to trips event(s).
Parameters
executor
Executor which will execute listener's callbacks