code: function BlankField(type, options) {
    Field.call(this, type, options);
  
    this.element = util.createElement(this.document, 'div');
  
    this.onFieldChange = util.createEvent('BlankField.onFieldChange');
  }
docs: For use with delegate types that do not yet have anything to resolve to.
  BlankFields are not for general use.