Processing sketches without a `setup` function are not supported

[SableRaf]

Thanks for this incredible tool Darren!

I was testing the official Processing examples in processing-p5-convert and noticed that Processing sketches which don't include a setup or draw function (such as this one) are not supported.

It's an easy fix to manually wrap the code in a void setup(){} of course, but maybe there is a way to automate it? Or alternatively, throw a beginner-friendly warning that only sketches with a setup function are supported 🤔