Deactivating a Group of Nodes if String Value is Blank

Hey, everyone - I am very new to Dynamo for Revit, and I’m having trouble figuring out how to build a certain function. So what I have is a Space and Room Data Clear program (Resets the name of your rooms and resets your numbering sequentially, starting at whatever number you want it to start at) and while it works fine, I want to be able to add the function that if the String entry for the “Set Name You Want Rooms to Restart to” is blank, then the names of the rooms would be left as is (prior to running the program), as opposed to being cleared out and restarted from blank.

I understand this could be resolved by just having two separate programs (one for resetting the numbering and one for resetting the room names) but for efficiency’s sake, how would I do this in one?

I’m unable to upload the Dynamo file here because I’m a new user and it won’t let me, so here’s a Dropbox link to the file: