*
     * @return An <code>int</code> containing the flags in use for this
     * message.
     */
    public int getFlags() {
        return flags;
    }

    /**
     * Sets the flags for this message.
     *
     * @param flags The flags for this message.
     */
    public void setFlags(int flags) {
        this.flags = flags;
    }

    /**
     * Returns the status of the specified flag.
     *

     *            Indicates whether to set (<code>true</code>) or
     *            clear (<code>false</code>) the specified flag.
     */
    public void setFlag ( int flag, boolean value ) {
        setFlags(value ? ( getFlags() | flag ) : ( getFlags() & ( 0xffffffff ^ flag ) ));
    }


    static int readULong ( byte[] src, int index ) {