public function getDefaultGrant()
{
$grant = new Grant();
$grant->add(static::ACCESS, 'rating', 'guest');
$grant->add(static::ACCESS, 'group', []);
$grant->add(static::ACCESS, 'user', []);
$grant->add(static::ACCESS, 'except', []);
$grant->add(static::VISIBLE, 'rating', 'guest');
$grant->add(static::VISIBLE, 'group', []);
$grant->add(static::VISIBLE, 'user', []);
$grant->add(static::VISIBLE, 'except', []);
return $grant;
}