* (name, sortName (key to the sort array))
*
* @param string $action the action being performed
* @param enum $output what should the result set include (web/email/csv)
*
* @return array the column headers that need to be displayed
* (name, sortName (key to the sort array))
*
* @param string $action the action being performed
* @param enum $output what should the result set include (web/email/csv)
*
* @return array the column headers that need to be displayed