span>app/initializers/main.js</span><pre class="language-javascript line-numbers"><code class="javascript language-javascript"><span class="token keyword">if</span> <span class="token punctuation">(</span>Ember<span class="token punctuation">.</span>Debug <span class="token operator">&amp;&amp;</span> <span class="token keyword">typeof</span> Ember<span class="token punctuation">.</span>Debug<span class="token punctuation">.</span>registerDeprecationHandler <span class="token operator">===</span> <span clas