Macro for NR appendix

[Dan Eble]

I tried this:

    @macro appendixBarLineDemo{BARTYPE}
    @code{"\BARTYPE\"}
    @lilypond[notime,relative=2]
    \bar "\BARTYPE\" b4 \bar "\BARTYPE\" b4 \bar "\BARTYPE\"
    @end lilypond
    @end macro

but with \BARTYPE\ in the lilypond section, no staff appears in the PDF.  I 
guess I need some additional quoting — or unquoting.  Is there a way to make 
this work or am I stuck writing out the bar type 4 times per type?

Thanks,
— 
Dan