="dart-io/IOSink/add.html">add</a></span><span class="signature">(<wbr><span class="parameter" id="add-param-data"><span class="type-annotation"><a href="dart-core/List-class.html">List</a><span class="signature">&lt;<a href="dart-core/int-class.html">int</a>&gt;</span></span> <span class="parameter-name">data</span></span>)
            <span class="returntype parameter">&#8594; void</span>
          </span>
        </dt>
        <dd class="inherited">
          Adds byte <code>data</code> to the target con