Order of Pipeline Browser Objects

Of course, sources have no inputs.

I understand your need now. Not supported, although would be nice.

You may be interested by the node editor plugin though:

Is there an official way for suggestions/requests like this to be logged for future versions of PV? Thank you for your help and consideration.

Actually @Venke understood this faster than me. You should just like venke proposal.

You should also consider contacting Kitware for a faster inclusion of this feature: