Thanks Guido! So is it safe to assume that all of the code written inside the [entity]_main_library.js libs was js code written by developers in a 4.0 environment?
In other words, are these js libs considered "native" in any way? Just wondering if there's a risk that if we migrate to the next version of CRM these js libs will get overwritten by new versions of those js libs for the next CRM version?