code: function(msg, arg) {
  			if (gui.Type.isEvent(arg)) {
  				arg = new gui.EventSummary(arg);
  			}
  			gui.Broadcast.dispatchGlobal(msg, arg);
  		}
docs: Broadcast something globally. Events will be wrapped in an EventSummary.
  @param {String} message gui.BROADCAST_MOUSECLICK or similar
  @param @optional {object} arg This could well be a MouseEvent