code: def get_webpack(request, name='DEFAULT'):
      
      if not hasattr(request, '_webpack_map'):
          request._webpack_map = {}
      wp = request._webpack_map.get(name)
      if wp is None:
          wp = request._webpack_map[name] = Webpack(request, name)
      return wp
docs: Get the Webpack object for a given webpack config.
  
      Called at most once per request per config name.