docs: def equivalent_release_for_product(self, product):
          """
          Returns the release for a specified product with the same
          channel and major version with the highest minor version,
          or None if no such releases exist
          """
          releases = self._default_manager.filter(
              version__startswith=self.major_version() + '.',
              channel=self.channel, product=product).order_by('-version')
          if not getattr(settings, 'DEV', False):
              releases = releases.filter(is_public=True)
          if releases:
              return sorted(
                  sorted(releases, reverse=True,
                         key=lambda r: len(r.version.split('.'))),
                  reverse=True, key=lambda r: r.version.split('.')[1])[0]