How to filter with itemgroup?

[towry]

I want to use legendary as folder action select, so I can select folder from telescope and use legendary.

So I write the script as following:

return function (cwd)
  legendary.funcs({
    itemgroup = 'Folder action',
    funcs = {},
})

legendary.find({
  select_prompt = 'Folder action under: ' .. cwd,
  filters = {
   --- how to write this??
  }
})
end

how to write the filters so that only everything under 'Folder action' item group shown?

I have looked over the docs, nothing found.

[mrjones2014]

A filter is just a function with the signature fun(item): bool, however there is currently no way to start the finder with an itemgroup already selected. That will require some plugin changes, but it's doable.