public function getAcl($objectIdentity)
    {
        $this->enforceObjectIdentity($objectIdentity);

        try {
            $acl = $this->securityContext->getACLProvider()->createAcl($objectIdentity);
        } catch (AclAlreadyExistsException $e) {
            $acl = $this->securityContext->getACLProvider()->findAcl($objectIdentity);
        }

        return $acl;
    }