/dt>
            <dd>
                <div class="is-const">
                    const
                </div>
                Static factory designed to expose <code class="prettyprint lang-dart">error</code> events to event
handlers that are not necessarily instances of <a href="polymer_app_layout/RtcDataChannel-class.html">RtcDataChannel</a>.
            </dd>
            <dt id="messageEvent" class="constant">
                <span class="top-level-variable-type"><a href="polymer_app_layout/EventStreamPr