code: def resolve_egg_link(path):
      
      referenced_paths = non_empty_lines(path)
      resolved_paths = (
          os.path.join(os.path.dirname(path), ref)
          for ref in referenced_paths
      )
      dist_groups = map(find_distributions, resolved_paths)
      return next(dist_groups, ())
docs: Given a path to an .egg-link, resolve distributions
      present in the referenced path.