docs: function getScrollPositionFromReal(scrollBarRealClickCoord, heightWidth, vertHorz) {
          var scrollBarTopClick = scrollBarRealClickCoord - grid.virtualPixelCellModel['fixed' + capitalize(heightWidth)]();
          var scrollRatio = scrollBarTopClick / getMaxScrollBarCoord(heightWidth, vertHorz);
          var scrollCoord = scrollRatio * model.maxScroll[heightWidth];
          return scrollCoord;
      }