I'm trying to understand how to use Table Function in Substrait. I looked at the docs at https://substrait.io/expressions/table_functions/ , but there are no explanation of how to use these. Is there some other place I can check?

I'd like to find out whether I could use Table Function to implement Presto's UNNEST: https://prestodb.io/docs/current/sql/select.html#unnest

Thanks.