package org.placelab.spotter;/** * SpotterListeners that also implement this interface will be notified * when the background operation for {@link Spotter#scanOnce()} concludes. */public interface ScanOnceListener extends SpotterListener {    /**     * Sent when a Spotter doing scanOnce concludes its operation.     * @param sender the Spotter that has concluded its scanOnce operation     * @see Spotter#scanOnce()     * @see Spotter#scanOnce(EventSystem)     */	public void endOfScan(Spotter sender);}