ml">int</a></span>         
        </dt>
        <dd>
          The compression-<a href="dart-io/ZLibCodec/level.html">level</a> can be set in the range of <code>-1..9</code>, with <code>6</code> being
the default compression level. Levels above <code>6</code> will have higher
compression rates at the cost of more CPU and memory usage. Levels below
<code>6</code> will use less CPU and memory at the cost of lower compression rates.
                  <div class="features">final</div>
</dd>
        <dt id="me