add
open fun addOnDirectionListener(listener: NavigationManager.OnDirectionListener)
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Add a OnDirectionListener to NavigationManager to subscribe to direction changed event(s).
open fun addOnDirectionListener(listener: NavigationManager.OnDirectionListener, @Nullable() executor: Executor)
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Add a OnDirectionListener to NavigationManager to subscribe to direction changed event(s).
Parameters
executor
Executor which will execute listener's callbacks