I need a file open dialog with a muliselect option within  ruby-TclTk .
Oddly enought this is supposedly available for the versions of tcltk >8.3
(in straight tcltk) but I can't seem to get it to work within Ruby. Any
suggestions or is this impossible within the current implementation?

Ideally a variant of Tk.getOpenFile with a -multiple option would be great
(but doesn't seem to exist)

thanks
s