$this->checkOwnablePermission('view', $attachment->page);
$this->checkOwnablePermission('page-update', $attachment->page);
$this->checkOwnablePermission('attachment-create', $attachment);
$this->checkOwnablePermission('view', $attachment->page);
$this->checkOwnablePermission('page-update', $attachment->page);
$this->checkOwnablePermission('attachment-create', $attachment);