presto-hive/src/main/java/io/prestosql/plugin/hive/util/InternalHiveSplitFactory.java/InternalHiveSplitFactory/getPathDomain
class InternalHiveSplitFactory:    private static Optional<Domain> getPathDomain(TupleDomain<HiveColumnHandle> effectivePredicate)
    {
        return effectivePredicate.getDomains()
                .flatMap(domains -> domains.entrySet().stream()
                        .filter(entry -> isPathColumnHandle(entry.getKey()))
                        .map(Map.Entry::getValue)
                        .findFirst());
    }