How to only format top border with BumbleBee Package

Hi everyone,

Today i found the bumblebee package and it is awesome what it can do :smiley:
I even did some formatting with the package nodes, but i couldnt find a node to only format the top border line (see red line in screenshot), do i need to add other input or a filter somewhere?

Thanks in advance!

did you find a solution for this?