The difference is super subtle, but the effect or consequence of that is very significant at runtime. General expressions and lambdas are supposed to be these really small, short in place bits of logic. And if it's getting complicated, write the full size thing. It's a lot easier to be bug. But all right, moving on packaging, yeah, siding on packaging and all that right up front. I'm actually gonna hijack something I learned from one of my guests on my own podcast recently is what a containers actually are,. by the way, Docker containers.