public void checkForHTTPException(Throwable throwable) {
		String msg = throwable.getMessage();
		boolean result = msg.contains(ERROR_HTTP_RESPONSE_401_UNAUTHORIZED_WHEN_COMMUNICATING);
		if (result) {
			throw new VaadinUIException(throwable.getMessage());
		} else {
			Throwable level1 = throwable.getCause();
			msg = level1.getMessage();
			result = msg.contains(ERROR_HTTP_RESPONSE_401_UNAUTHORIZED_WHEN_COMMUNICATING);
			if (result) {
				throw new VaadinUIException(level1.getMessage());
			} else {
				Throwable level2 = throwable.getCause();
				msg = level2.getMessage();
				result = msg.contains(ERROR_HTTP_RESPONSE_401_UNAUTHORIZED_WHEN_COMMUNICATING);
				if (result) {
					throw new VaadinUIException(level2.getMessage());
				} else {
					System.out.println("doh");
				}
			}
		}
	}