question: private void addToMap ( LocatorReg reg ) { undiscoveredLocators . add ( reg ) ; queueDiscoveryTask ( reg ) ; }
target:  Adds the given LocatorReg object to the set containing the objects corresponding to the locators of desired lookup services that have not yet been discovered, and queues a DiscoveryTask to attempt, through unicast discovery, to discover the associated lookup service.