="returntype">void</span>
            <span class="name ">insertAllBefore</span>
(<wbr><ol class="parameter-list"><li><span class="parameter" id="insertAllBefore-param-newNodes"><span class="type-annotation"><a href="../../dart-core/Iterable-class.html">Iterable</a><span class="signature">&lt;<wbr><span class="type-parameter"><a href="../../dart-html/Node-class.html">Node</a></span>&gt;</span></span> <span class="parameter-name">newNodes</span>, </span></li>
<li><span class="parameter" id="insertAllBefore-p