code: function getNewRow($tr) {
    const cloned = $tr.clone();
    const htmlString = util.browser.msie ? '' : '<br />';
  
    cloned.find('td').html(htmlString);
  
    return cloned;
  }
docs: Get new row of given row
  @param {jQuery} $tr - jQuery wrapped table row
  @returns {jQuery} - new cloned jquery element
  @ignore