-annotation"><a href="dart-core/StackTrace-class.html">StackTrace</a></span> <span class="parameter-name">stackTrace</span></span> ])
            <span class="returntype parameter">&#8594; void</span>
          </span>
        </dt>
        <dd class="inherited">
          Passes the error to the target consumer as an error event. <a href="dart-io/IOSink/addError.html">[...]</a>
          <div class="features">inherited</div>
</dd>
        <dt id="addStream" class="callable inherited">
          <span class