Prior art and having built up a "system" can also help. For example if you've written a lot of code over the years you can likely reuse a lot of it either from

Prior art and having built up a "system" can also help. For example if you've written a lot of code over the years you can likely reuse a lot of it either from memory or files stored and just copy and paste. i.e. they never said they spent a couple of hours doing it from 0. It's also possible they purchased a template of some sort and just modified it.