code: function _findFocusCell($newTable, rowIndex, colIndex) {
    const tableData = dataHandler.createTableData($newTable);
  
    if (tableData[0].length - 1 < colIndex) {
      colIndex -= 1;
    }
  
    const cellElementIndex = dataHandler.findElementIndex(tableData, rowIndex, colIndex);
  
    return $newTable.find('tr').eq(cellElementIndex.rowIndex).find('td, th')[cellElementIndex.colIndex];
  }
docs: Find focus cell element like td or th.
  @param {jQuery} $newTable - changed table jQuery element
  @param {number} rowIndex - row index of table data
  @param {number} colIndex - column index of tabld data
  @returns {HTMLElement}
  @private