presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/MongoSession.java/MongoSession/orPredicate
class MongoSession:    private static Document orPredicate(List<Document> values)
    {
        checkState(!values.isEmpty());
        if (values.size() == 1) {
            return values.get(0);
        }
        return new Document(OR_OP, values);
    }