final IPv6AddressRange freeRangeAfterNetwork = findFreeRangeAfter(toDeAllocate);
final IPv6AddressRange freeRangeAfterNetwork = findFreeRangeAfter(toDeAllocate);
final IPv6AddressRange freeRangeAfterNetwork = findFreeRangeAfter(toDeAllocate);
final IPv6AddressRange freeRangeAfterNetwork = findFreeRangeAfter(toDeAllocate);