public function testEmptyStringFromString()
 {
     $s = Entitlement::fromString("");
     $this->assertTrue($s->isEmpty());
 }
 /**
  * OPTIONAL|NON-STANDARD.  A space-separated list of strings representing
  * the entitlements associated with this token, in the format described in
  * Section 3.3 of OAuth 2.0 [RFC6749].
  *
  * @return fkooman\OAuth\Common\Entitlement
  */
 public function getEntitlement()
 {
     if (null === $this->getKeyValue('x-entitlement')) {
         return new Entitlement();
     }
     return Entitlement::fromString($this->getKeyValue('x-entitlement'));
 }