, error ), ; @interface, TWTRGuestSession :, NSObject <, TWTRBaseSession >, @property (, nonatomic ,, copy ,, readonly ), NSString *accessToken, ; @property, ( nonatomic, copy ,, readonly ), NSString *guestToken, ; @property, ( nonatomic, readonly ), BOOL probablyNeedsRefreshing, ; -, ( instancetype, ) initWithSessionDictionary, : (, NSDictionary *), sessionDictionary ;, - (, instancetype ), initWithAccessToken :, ( NSString, * ), accessToken guestToken, : (, nullable NSString, * ), guestToken ;, - (, insta