Building a cat box into the rig

I saw a Class A gas RV with the center door. The owner has cut a round hole thru the step well into the adjacent compartment. He had the litter box there. Also he had installed a wire mesh screen to keep the cat inside when the compartment door was open. The cat could go and come as she pleased. I thought it was about the cleverest idea for a cat that I have seen. Sure wish I had taken a picture.

Nicely done!