public function unlock(string $sessionIdentifier): void
    {
        $index = array_search($sessionIdentifier, self::$lockedIdentifiers);

        if ($index !== false) {
            unset(self::$lockedIdentifiers[$index]);
        }
    }
public function unlock(string $sessionIdentifier): void
    {
        $index = array_search($sessionIdentifier, self::$lockedIdentifiers);

        if ($index !== false) {
            unset(self::$lockedIdentifiers[$index]);
        }
    }
public function unlock ( string $ sessionIdentifier ) : void { $ index = array_search ( $ sessionIdentifier , self :: $ lockedIdentifiers ) ; if ( $ index !== false ) { unset ( self :: $ lockedIdentifiers [ $ index ] ) ; } }
Asks the drive to unlock the session storage

@param string $sessionIdentifier The session identifier to be unlocked
@return void
Asks the drive to unlock the session storage