code: function() {
  
  		this._initGlobal(Lava.schema.system.VIEW_MANAGER_CLASS, 'view_manager');
  		this._initGlobal(Lava.schema.system.APP_CLASS, 'app');
  		this._initGlobal(Lava.schema.popover_manager.CLASS, 'popover_manager');
  		this._initGlobal(Lava.schema.focus_manager.CLASS, 'focus_manager');
  
  	}
docs: Create global class instances