Where can i see builtin icons

env: Fedora29
version: Igniton 8.0.3
when i use Navigation Tree View in Vision, i want to change the tree icon.
where can i see all builtin icons , not throught Tools- images management?

Select TreeView, then click on the icon to open image path for Default Open Icon, Default Closed Icon and Default Leaf Icon:

You can also open Tools/Images, right click on the icon and Copy Path, then paste into Default Open Icon…

I see,Thank you very much.