/**
     * Set received status
     */
    void received ();


    /**
     * Unset received status
     */
    void clearReceived ();


    /**
     * 
     * @return number of credits granted by the server
     */
    int getGrantedCredits ();


    /**
     * @return status code
     */
    int getErrorCode ();


    /**
     * @param k
     */
    void setMid ( long k );