beast.ref.boost__beast__http__span_body.size.description">Description</a>
        </h6>
<p>
          When this body is used with <a class="link" href="../boost__beast__http__message/prepare_payload.html" title="http::message::prepare_payload"><code class="computeroutput"><span class="identifier">message</span><span class="special">::</span><span class="identifier">prepare_payload</span></code></a>, the Content-Length
          will be set to the payload size, and any chunked Transfer-Encoding will
        