Change folder visibility by umg button

Hi,
Is there a way, to toggle off or on the visibility of one folder by menu button?

Example: i add many trees to my Projekt and put them in one folder. The user can now toggle the visibility of all trees in the folder, on or off.

Ok. now i can switch the visibility of static meshes by buttonclick. the problem here is, that every static mesh must be integrated seperated. that takes time. is there no other way to do this? to integrate a hole folder?!

switch the visibility of static meshes by button click, can you please share the blue print for this.