/**
  * Returns the corresponding session for the provided access token.
  * 
  * @param AccessToken $accessToken
  * @return Session
  */
 public function getSessionByAccessToken(AccessToken $accessToken)
 {
     return $this->getStorageWithCheck()->loadSession($accessToken->getSessionId());
 }
 public function testGetSessionId()
 {
     $this->assertEquals('session_id_123', $this->_token->getSessionId());
 }