ken punctuation">{</span>
      <span class="token function">alert</span><span class="token punctuation">(</span><span class="token string">'Sorry, you need a time machine to enter this route.'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
      transition<span class="token punctuation">.</span><span class="token function">abort</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span cla