docs: function focusToFirstTd(sq, range, $tr, tableMgr) {
    const nextFocusCell = $tr.find('td').get(0);
    range.setStart(nextFocusCell, 0);
    range.collapse(true);
  
    tableMgr.setLastCellNode(nextFocusCell);
    sq.setSelection(range);
  }