Many of my one-of assemblers/foundries/etc are wired up to the chest they put their items in so they don't produce more than a certain amount of an item. So a condition of my assembler would be to only produce when Inserters<100. But like a caveman, I have to click through the lists of items to find the one I want rather than having it available in your mod's menu.

https://i.imgur.com/dN6tWQ4.png

You can click Q on the inserter icon on the result, to get it as a ghost in hand, which you can then use to click on the condition.

P.S. For this kind of thing I recommend making a parameterized BP for the inserter+chest, having them automatically filtered by your parameter.