ass="identifier">storage_ptr</span><span class="special">().</span><span class="identifier">get</span><span class="special">()</span> <span class="special">);</span>    <span class="comment">// uses the default memory resource</span>
<span class="identifier">assert</span><span class="special">(</span> <span class="identifier">jv</span><span class="special">.</span><span class="identifier">storage</span><span class="special">().</span><span class="identifier">get</span><span class="special">()</span> <span c