   <span class="special">{</span>
        <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">name</span><span class="special">;</span>
        <span class="keyword">int</span> <span class="identifier">age</span><span class="special">;</span>
    <span class="special">};</span>
<span class="special">}</span>

<span class="keyword">namespace</span> <span class="identifier">keys</span>
<span class="special">{</span>
    <span class=