span><span class="special">::</span><span class="identifier">need_buffer</span></code></a>, indicating to the
          caller that the values of <code class="computeroutput"><span class="identifier">data</span></code>
          and <code class="computeroutput"><span class="identifier">size</span></code> should be updated
          to point to a new memory buffer.
        </p>
</div>
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