Import a folder of photos, using reference to the files only, using a script

[BAleiHi]

When I import photos into a Container using a script, there is no option to import a reference to the file only as there is in a separate dialog when I do this manually.  How do I import a folder to a container field, using the reference only, within a script?

Doh!  Never mind.  Just found it in the option when I specify "Folder".  I'd swear that dialog didn't appear yesterday (or was that my mind that didn't appear yesterday?)