{@code relativePath} allows you to select a different location,
            for example when your structure is flat, or deeper without an intermediate parent POM.
            However, the group ID, artifact ID and version are still required,
            and must match the file in the location given, or it will revert to the repository for the POM.

  <!-- mirrors
   | This is a list of mirrors to be used in downloading artifacts from remote repositories.
   |
   | It works like this: a POM may declare a repository to use in resolving certain artifacts.
   | However, this repository may have problems with heavy traffic at times, so people have mirrored
   | it to several places.
   |
   | That repository definition will have a unique id, so we can create a mirror reference for that