Fontawesome for groups not working on vis timeline

[webwakko]

I'm trying to implement font awesome to show icons in the groups column. the vue way of using font awesome <font-awesome-icon icon="search" /> works outside the timeline, but how can I use the same way inside the timeline? (instead of having a button with the text "hide" next to the groupnames. fyi : I created a grouptemplate to add the button to the view.. all works, except the icon