/**
* Get the expiry time for a given action, by combining the relevant inputs.
*
- * @return 14-char timestamp or "infinity", or false if the input was invalid
+ * @param $action string
+ *
+ * @return string 14-char timestamp or "infinity", or false if the input was invalid
*/
function getExpiry( $action ) {
if ( $this->mExpirySelection[$action] == 'existing' ) {