code: function getPixelHeights(tableGrid) {
  
          var rows = getRowBlocks(tableGrid);
  
          var backups = Tools.map(rows, function (row) {
            return getTopEdge(row.rowIndex, row.element).y;
          });
  
          var heights = [];
  
          for (var i = 0; i < rows.length; i++) {
            var span = rows[i].element.hasAttribute('rowspan') ? parseInt(rows[i].element.getAttribute('rowspan'), 10) : 1;
  
            var height = span > 1 ? deduceSize(backups, i) : getPixelHeight(rows[i].element);
  
            height = height ? height : RESIZE_MINIMUM_HEIGHT;
            heights.push(height);
          }
  
          return heights;
        }
docs: Attempt to get the css height from row representative cells.