docs: def post_process(self, paths, dry_run=False, **options):
          """
          Overridden to allow some files to be excluded (using
          ``postprocess_exclusions``)
  
          """
          if self.postprocess_exclusions:
              paths = dict((k, v) for k, v in paths.items() if not
                      self.exclude_file(k))
          return super(CachedFilesMixin, self).post_process(paths,
                  dry_run, **options)