text: /**
   * @license
   * Copyright 2015 Google Inc. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   */
  
  CLASS({
    name: 'ExpandableSection',
    package: 'foam.flow',
    extends: 'foam.flow.Element',
  
    requires: [
      'foam.ui.md.SectionView',
      'foam.ui.md.ExpandableView'
    ],
  
    properties: [
      {
        model_: 'StringProperty',
        name: 'heading'
      },
      {
        model_: 'StringProperty',
        name: 'content'
      },
      {
        model_: 'BooleanProperty',
        name: 'expanded',
        defaultValue: false
      },
      {
        name: 'view',
        lazyFactory: function() {
          return this.SectionView.create({
            title$: this.heading$,
            expanded$: this.expanded$,
            delegate: this.ExpandableView.xbind({
              delegate: function() { return this.content; }.bind(this)
            })
          });
        }
      }
    ],
  
    templates: [
      function toInnerHTML() {/* %%view */},
      function CSS() {/* expandable-section { display: block; } */}
    ]
  });
  