/**
* A private method that can be inherited and used by children classes to
* calculate the total sum of all data rows, and store it in the
* {@link $this->aTotal} array.
*
* Also sets {@link $this->showTotals} to true, if required.
*
* @access private
* @param array $aRows An array of rows of statistics to summarise.
*/
function _summariseTotals(&$aRows)
{
parent::_summariseTotals($aRows);
$this->_summarizeStats($this->aTotal);
}
