These files are available in the repository. Since some of these files have copyright protection, the developers can only use them.
When developing an addon, the developers use call by function method to call these dependencies files into action. Some of the most used dependencies are scrapper and URL Resolver. These support files are called dependencies. For the proper functioning of add-ons, a lot of files are required. Kodi Repositories act as a space to store common files and they are accessed by add-ons.
5.2 TV Addons Repository a.k.a Fusion Repo.