> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token parameter">assert</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    assert<span class="token punctuation">.</span><span class="token function">expect</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token comment">// get the route inst