function deepCloneVNode(vnode) {
      const cloned = cloneVNode(vnode);
      if (isArray(vnode.children)) {
          cloned.children = vnode.children.map(deepCloneVNode);
      }
      return cloned;
  }
Dev only, for HMR of hoisted vnodes reused in v-for
https://github.com/vitejs/vite/issues/2022