presto-parser/src/main/java/io/prestosql/sql/tree/DefaultTraversalVisitor.java/DefaultTraversalVisitor/visitRow
class DefaultTraversalVisitor:    @Override
    protected R visitRow(Row node, C context)
    {
        for (Expression expression : node.getItems()) {
            process(expression, context);
        }
        return null;
    }