public static function set_swap_id($name = '')
{
if (!empty($name)) {
self::$swap_name = $name;
} elseif (empty($name) and empty(self::$swap_name)) {
self::$swap_name = 'swap_fragment';
}
// create new id
$counter = self::counter();
$name = self::$swap_name;
return $name . "_" . $counter;
}
