icon icon="[[_icon]]" title$="[[_label]]"></iron-icon>
    <span hidden$="[[noLabel]]">[[_label]]</span>
  </template>
</dom-module>

<script>
Polymer({
  is: 'cart-item-icon',
  properties: {
    element: {type: String, observer: '_update'},
    presentLabel: {type: String, value: 'Remove from Collection', observer: '_update'},
    absentLabel: {type: String, value: 'Add to Collection', observer: '_update'},
    present: {type: Boolean, notify: true, readOnly: true, value: false},
    noLabel: {type: Boole