implicitly created when one element is
  nested in another?</p>

<p><code>impliedElements['x']['z'] == ['y']</code> when parsing
  <code>&lt;x&gt;&lt;z&gt;&lt;/z&gt;&lt;/x&gt;</code> produces
  a tree equivalent to <code>&lt;x&gt;&lt;y&gt;&lt;z&gt;&lt;/z&gt;&lt;/y&gt;&lt;/x&gt;</code>

<pre class="json" id="implied-elements-json"></pre>
<script>
var impliedElements = getOwn(cannedData, 'impliedElements') || new Promise();
(function () {
  // Generates HTML for the experiment.
  function nestElements(element