static function db_listQuery($field, $value)
 {
     $value = (string) $value;
     if (strpos(',', $value) !== FALSE) {
         throw new InvalidArgumentException('$value must not contain a comma (,) in $this->db_listQuery() !', 1294585862);
     }
     $pattern = tx_ameosformidable::db_quoteStr($value);
     $where = 'FIND_IN_SET(\'' . $pattern . '\',' . $field . ')';
     return $where;
 }