code: function postTransformComponent (
    el,
    options
  ) {
    // $flow-disable-line (we know isReservedTag is there)
    if (!options.isReservedTag(el.tag) && el.tag !== 'cell-slot') {
      addAttr(el, RECYCLE_LIST_MARKER, 'true');
    }
  }
docs: mark components as inside recycle-list so that we know we need to invoke their special @render function instead of render in create-component.js