table cell render - per column, per row, per data type

Typically, you associate a table cell render (Instance, not class) on a column. (A column is a homogeneous data type.)

You can also associate a render object to a class (such as Account or Student).

It's less natural to associate a render to a row. You can, however, adapt the render behavior to a row, perhaps based on the row number, or any property of the actual "value" object