/**
 * @param array $privileges
 * @param string $resource
 * @param string $action
 * @return array
 */
private function searchPrivileges($privileges, $resource, $action)
{
    return Kdyby\Tools\Arrays::flatFilter($privileges, function (Privilege $privilege) use ($resource, $action) {
        return ($resource === '*' || $resource === $privilege->getResource()->getName())
            && ($action === '*' || $action === $privilege->getAction()->getName());
    });
}