);
serverExpectations.get(lastServer).addExpectation(expectation);
ServerSelector selector = new ServerSelector(
expectation.getSegment(),
new HighestPriorityTierSelectorStrategy(new RandomServerSelectorStrategy())
);
selector.addServer(new QueryableDruidServer(lastServer, null));
final PartitionChunk<ServerSelector> chunk;
if (numChunks == 1) {