presto-main/src/main/java/io/prestosql/memory/NoneLowMemoryKiller.java/NoneLowMemoryKiller/chooseQueryToKill
class NoneLowMemoryKiller:    @Override
    public Optional<QueryId> chooseQueryToKill(List<QueryMemoryInfo> runningQueries, List<MemoryInfo> nodes)
    {
        return Optional.empty();
    }