Describe the bug

per #1191 adding FilterFunc, the docs showing how to use this function crashes in yaegi.

How to reproduce

uncomment the code below in docs/other/file-trees.md

Example code

You can filter which files or directories are shown:


ft := filetree.NewTree(b)
ft.FilterFunc = func(path string, info fs.FileInfo) bool {
    return info.IsDir() // only show directories
}
ft.OpenPath(".")

Relevant output

No response

Platform

macOS