How do I customize the Ext.grid.RowBodyFeature of ExtJS 4.0?

I have implemented the getAdditionalData in ExtJS's grid.panel.

I have it showing the extra information but I want 开发者_Python百科to style the extra row. Basically make the font smaller, etc.

Other than wrapping my data in span tags, is there another way to alter the style for those rows?

Thanks.

I found the answer. It was just easier to use a custom renderer.