String error(NS_LITERAL_STRING("forwarded error: "));
nsAutoString error(NS_LITERAL_STRING("forwarded error: "));
    void receiveError(const String& aMsg, nsresult aRes)    {        NS_ASSERTION(mInner, "mInner is null!!!");#ifdef DEBUG        String error(NS_LITERAL_STRING("forwarded error: "));        error.Append(aMsg);        mInner->receiveError(error, aRes);#else        mInner->receiveError(aMsg, aRes);#endif    }