You don't need constraints in this case because it doesn't matter what T is; you aren't calling any methods or properties of T. T can literally be of any type. If, however, you want to work with the ...

Say we have two types of tools: hammers and wrenches. We have a list of work orders, and we want to track what tool was used for the hammering and what was used for the wrenching. The problem is that ...