code: function _handleDocGeneratorSettingsChange(id, change) {
          var curSettings = _getChangedSettings(change.current),
              prevSettings = _getChangedSettings(change.previous),
              curEnabled = !!(curSettings && curSettings.enabled),
              prevEnabled = !!(prevSettings && prevSettings.enabled);
          
          if (prevEnabled !== curEnabled) {
              if (curEnabled) {
                  _stateManager.activate(id);
              } else {
                  _stateManager.deactivate(id);
              }
          }
      }
docs: Handler for a the "generatorSettings" change event fired by Document objects. Updates
  the state manger based on the current doc setting if the enable settings actually
  changed
  
  @private
  @param {number} id The ID of the Document that changed
  @param {{previous: settings=, current: settings=}} change The previous and current
  document settings