="x-deep-contains">
  <template>
    <div id="shadowed"></div>
    <slot name="light"></slot>
  </template>
  <script type="module">
import '../../polymer-legacy.js';
import { Polymer } from '../../lib/legacy/polymer-fn.js';
Polymer({
  is: 'x-deep-contains',
  created: function() {
    var e = document.createElement('div');
    e.setAttribute('slot', 'light');
    this.appendChild(e);
    e = document.createElement('div');
    e.setAttribute('slot', 'notdistributed');
    this.appendChild(e);
  }
});
</scr