Great
That was fuzzy info for me for along time .
It caused me a lot of confusion.
Had to rant as I am grumpy old man.
Maybe it will help someone else.
I know I feel better when I understand the process.
If you are default(VO) coding a module it will wipe coding out only
for that module.
If you take your car in and BMW codes your car it will most likely
wipe out all your coding.