get
fun getDroneList(@NonNull filter: Predicate<DroneListEntry>, @NonNull observer: Ref.Observer<List<DroneListEntry>>): Ref<List<DroneListEntry>>
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Gets a list of known drones and registers an observer notified each time this list changes.
Return
a reference to the requested list
Parameters
filter
filter to select drones to include into the returned list. The filter criteria must not change during the list reference lifecycle.
observer
observer notified each time this list changes