n>
      <span class="token function">alert</span><span class="token punctuation">(</span>reason<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// "FAIL"</span>

      <span class="token comment">// Can transition to another route here, e.g.</span>
      <span class="token comment">// this.transitionTo('index');</span>

      <span class="token comment">// Uncomment the line below to bubble this error event:</span>
      <span class="token comment