Diagnostics for missing usage of a command/query?

[EluciusFTW]

I a recent project I was working on, I discovered to my big surprise that a command/commandhandler was never used, i.e., nowhere in the application that command was sent out.

Would it make sense to add diagnostics for this case as well in order to make it easier to discover dead code?

[MaxLevs]

It would help as an optional tool. E.x. some analyzer to run.

[martinothamar]

Think this is a good idea, and we have similar diagnostics for missing handlers. If someone wants to contribute this is up for grabs