docs: function () {
          var dimensions = this.dimensions;
          var axesMap = this._axesMap;
          var hasActiveSet = false;
  
          for (var j = 0, lenj = dimensions.length; j < lenj; j++) {
              if (axesMap.get(dimensions[j]).model.getActiveState() !== 'normal') {
                  hasActiveSet = true;
              }
          }
  
          return hasActiveSet;
      }