Hi,

I want to be able to upload to ProGet using the Inedo ProGet Jenkins plugin without specifying a groupName, so that the package is at the root level of the feed, not in a group sub-level.  If I do this now, the upload ends up in a null group in the target feed.

See discussion here: https://forums.inedo.com/topic/3456/proget-no-groupname-option

It appears the line the Inedo engineer found is the culprit. The plugin code appears to assume the groupName parameter is always non-null. 

Thank you!