}
    public int getTailSpace() {
        return buf.length - index;
    }
    public byte[] getBuffer() {
        return buf;
    }
    public int align(int boundary, byte value) {
        int n = align(boundary);
        int i = n;
        while (i > 0) {
            buf[index - i] = value;
            i--;
        }
        return n;
    }

        return this.buf.length - this.index;
    }


    public byte[] getBuffer () {
        return this.buf;
    }


    public int align ( int boundary, byte value ) {
        int n = align(boundary);
        int i = n;
        while ( i > 0 ) {
            this.buf[ this.index - i ] = value;
            i--;
        }
        return n;
    }

    /**
     * 
     */
    public static final int FLAGS_NAME_LIST_REFERRAL = 0x0002;
    /**
     * 
     */
    public static final int FLAGS_TARGET_SET_BOUNDARY = 0x0004;
    /**
     * 
     */
    public static final int TYPE_ROOT_TARGETS = 0x0;
    /**
     * 
     */
    public static final int TYPE_NON_ROOT_TARGETS = 0x1;