"use strict";
  
  // https://html.spec.whatwg.org/multipage/window-object.html#browser-interface-elements
  class BarPropImpl {}
  
  // Since many BarProps do not apply to modern browsers,
  // returning true in all cases seems to be common practice.
  BarPropImpl.prototype.visible = true;
  
  exports.implementation = BarPropImpl;