</h6>
<h6>
<a name="beast.ref.boost__beast__http__buffer_body__value_type.size.h2"></a>
          <span class="phrase"><a name="beast.ref.boost__beast__http__buffer_body__value_type.size.when_serializing"></a></span><a class="link" href="size.html#beast.ref.boost__beast__http__buffer_body__value_type.size.when_serializing">When
          Serializing</a>
        </h6>
<p>
          If <code class="computeroutput"><span class="identifier">data</span></code> is <code class="computeroutput"><span class="keyword