presto-parser/src/main/java/io/prestosql/sql/tree/Unnest.java/Unnest/Unnest
class Unnest:    private Unnest(Optional<NodeLocation> location, List<Expression> expressions, boolean withOrdinality)
    {
        super(location);
        requireNonNull(expressions, "expressions is null");
        this.expressions = ImmutableList.copyOf(expressions);
        this.withOrdinality = withOrdinality;
    }