docs: function(nameOrIndex){
          if (nameOrIndex === Xmla.Dataset.AXIS_SLICER) return this._slicer;
          var axis = this._getAxis(nameOrIndex);
          if (!axis)
              Xmla.Exception._newError(
                  "INVALID_AXIS",
                  "Xmla.Dataset.getAxis",
                  nameOrIndex
              )._throw();
          return axis;
      }