hod</h1></div>

    <section class="multi-line-signature">
      <span class="returntype">void</span>
            <span class="name ">insert</span>
(<wbr><span class="parameter" id="insert-param-index"><span class="type-annotation"><a href="dart-core/int-class.html">int</a></span> <span class="parameter-name">index</span>, </span> <span class="parameter" id="insert-param-element"><span class="type-annotation"><a href="dart-core/double-class.html">double</a></span> <span class="parameter-name">element</span>