Coincidentally covered, but just not in terms of functions :) 5.1. Sandwich Layers Lets take a concise, closely bound action and split it into 10 or 20 sandwi

Coincidentally covered, but just not in terms of functions :) 5.1. Sandwich Layers Lets take a concise, closely bound action and split it into 10 or 20 sandwiched layers, where none of the individual layers make any sense without the whole. Because we want to apply the concept of “Testable code”, or “Single Responsibility Principle”, or something. But you have expressed this way better than I did, thanks :)