sumer, ignoring <a href="dart-io/IOSink/encoding.html">encoding</a>. <a href="dart-io/IOSink/add.html">[...]</a>
          <div class="features">inherited</div>
</dd>
        <dt id="addError" class="callable inherited">
          <span class="name"><a href="dart-io/IOSink/addError.html">addError</a></span><span class="signature">(<wbr><span class="parameter" id="addError-param-error"><span class="parameter-name">error</span>, [</span> <span class="parameter" id="addError-param-stackTrace"><span class="type