How to remove Default padding for Expansion Field in Header of the Grid.

[sathis201021]

I have a ListGrid with Custom Expansion Component. But in the Expansion Field theres a Line padding. I want to remove this Line.
Please see the below Image

[Isomorphic]

There is a line between every header, so there is a line separating the header for the expansion field. You want to remove just that one line? That's going to look inconsistent.

If you really wanted to do it, provide a replacement headerBaseStyle by configuring the expansionField autoChild.