This happens to me all the time. I forget inner working of modules I wrote 1-2 months back. I consider it to be a positive thing if I can get by looking at the

This happens to me all the time. I forget inner working of modules I wrote 1-2 months back. I consider it to be a positive thing if I can get by looking at the public API of the module and not worrying about the internal working. It means I designed and encapsulated it well :)