Insert a line after a certain number of rows in datagrid in flex

Is there a way to insert a horizontal line after a certain number o开发者_JAVA技巧f rows, which may be variable depending upon a property in data provider of a datagrid?

Thanks.

One possible approach might be custom renderer, which will draw lines at bottom of cell based on data.

A custom cellRenderer is the only way I can think of.

This is pretty much the definitive resource I have found on dataGrids.

http://www.adobe.com/devnet/flash/quickstart/datagrid_pt3.html