an class="token string">'error'</span><span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token parameter">error</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  Ember<span class="token punctuation">.</span>Logger<span class="token punctuation">.</span><span class="token function">assert</span><span class="token punctuation">(</span><span class="token boolean">false</span><span class