src/Payum/Core/Storage/FilesystemStorage.php
protected function doDeleteModel($model)
    {
        $rp = new \ReflectionProperty($model, $this->idProperty);
        $rp->setAccessible(true);

        if ($id = $rp->getValue($model)) {
            unlink($this->storageDir.'/payum-model-'.$id);
            unset($this->identityMap[$id]);
        }
    }
protected function doDeleteModel($model)
    {
        $rp = new \ReflectionProperty($model, $this->idProperty);
        $rp->setAccessible(true);

        if ($id = $rp->getValue($model)) {
            unlink($this->storageDir.'/payum-model-'.$id);
            unset($this->identityMap[$id]);
        }
    }
{@inheritDoc}