code: def serve_coil_assets(path):
      
      res = pkg_resources.resource_filename(
          'coil', os.path.join('data', 'coil_assets'))
      return send_from_directory(res, path)
docs: Serve Coil assets.
  
      This is meant to be used ONLY by the internal dev server.
      Please configure your web server to handle requests to this URL::
  
          /coil_assets/ => coil/data/coil_assets