code: function _runCallback(eventName, data) {
        for (var id in _mappings[eventName].callbacks) {
          var callbackObject = _mappings[eventName].callbacks[id];
  
          if (typeof callbackObject.cb === 'function') callbackObject.cb(data);
          if (typeof callbackObject.once === 'boolean' && callbackObject.once === true) _self.off(eventName, callbackObject.cb);
        }
      }
docs: ------------------------------------------------------------------------------------------ -- Private methods ------------------------------------------------------------------------------------------