furagu/vargs-callback — pull request #1 by harscoet (2014-06-04 07:59:01+00:00)
Title: Add optional argument to vargs to be able to force presence of callback

Hello,
I use a lot this module which is an excellent solution. I propose this simple addition to make it less verbose verification callback. A lot of functions have no meaning without callback. No impact on the use because by default the parameter is undefined