class="special">);</span>                               <span class="comment">// shared ownership</span>
<span class="identifier">assert</span><span class="special">(</span> <span class="identifier">str</span><span class="special">.</span><span class="identifier">storage</span><span class="special">().</span><span class="identifier">is_shared</span><span class="special">()</span> <span class="special">);</span>                    <span class="comment">// shared ownership</span>
</pre>
<p>
        When a sto