How to increase width and change icon in DataGrid Master Detail Hierarchy

[enchev]

Check again my previous reply, here are the relevant classes:

You can check also this thread with similar approach for different component:

Change toggle icon

I have created two entries in the style.css file, one to change the plus toggle and one to change the minus toggle on a panel. I am only able to add one parameter called class, so I can only affect one of the two toggles. Is there another way around this?