Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken::getProviderKey PHP Method

    public function getProviderKey()
    {
        return $this->providerKey;
    }

 public function testConstructor()
 {
     $token = new PreAuthenticatedToken('foo', 'bar', 'key');
     $this->assertFalse($token->isAuthenticated());
     $token = new PreAuthenticatedToken('foo', 'bar', 'key', array('ROLE_FOO'));
     $this->assertTrue($token->isAuthenticated());
     $this->assertEquals(array(new Role('ROLE_FOO')), $token->getRoles());
     $this->assertEquals('key', $token->getProviderKey());
 }