at provides the default value if the argument was not
provided.</p>
<p>For instance, if you wanted to create a tooltip icon that had a standard icon
and class, you could do it like so:</p>
<div class="filename javascript"><div class="ribbon"></div><span>app/components/tooltip.js</span><pre class="language-javascript line-numbers"><code class="javascript language-javascript"><span class="token keyword">import</span> Component <span class="token keyword">from</span> <span class="token string">'@glimmer/compon