presto-parser/src/main/java/io/prestosql/sql/tree/DefaultTraversalVisitor.java/DefaultTraversalVisitor/visitDereferenceExpression
class DefaultTraversalVisitor:    @Override
    protected R visitDereferenceExpression(DereferenceExpression node, C context)
    {
        process(node.getBase(), context);
        return null;
    }