 class="keyword">noexcept</span> <span class="special">{</span>
        <span class="keyword">return</span> <span class="identifier">bundle_</span><span class="special">.</span><span class="identifier">size</span><span class="special">();</span>
    <span class="special">}</span>

    <span class="identifier">iterator</span> <span class="identifier">begin</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span> <span class="special">{</span>
        <spa