docs: function _parseCell(cell, rowIndex, colIndex) {
    const $cell = $(cell);
    const colspan = $cell.attr('colspan');
    const rowspan = $cell.attr('rowspan');
    const {nodeName} = cell;
  
    if (nodeName !== 'TH' && nodeName !== 'TD') {
      return null;
    }
  
    const cellData = {
      nodeName: cell.nodeName,
      colspan: colspan ? parseInt(colspan, 10) : 1,
      rowspan: rowspan ? parseInt(rowspan, 10) : 1,
      content: $cell.html(),
      elementIndex: {
        rowIndex,
        colIndex
      }
    };
  
    if (cell.nodeName === 'TH' && cell.align) {
      cellData.align = cell.align;
    }
  
    return cellData;
  }