al">(</span><span class="identifier">get_next_chunk_body</span><span class="special">(),</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">move</span><span class="special">(</span><span class="identifier">ext</span><span class="special">)));</span>
</pre>
<p>
        Callers can take over the generation and management of the extensions buffer
        by passing a non-owning string. Note that this requires the string contents
        to adhere to the correct sy