 <span class="signature">&#8594; <a href="dart-core/bool-class.html">bool</a></span>         
        </dt>
        <dd>
          When true, <code>GZip</code> frames will be added to the compressed data.
                  <div class="features">final</div>
</dd>
        <dt id="level" class="property">
          <span class="name"><a href="dart-io/ZLibEncoder/level.html">level</a></span>
          <span class="signature">&#8594; <a href="dart-core/int-class.html">int</a></span>         
        </dt>
      