How to tweak/override the individual Glissando objects in a chord?

[Dominic]

Hello all, sorry for the frequent posting but I'm learning a lot!

Here is a small example:
/\relative c' { <a'' b c>1 \glissando <c, d e>1 }/

If I wanted to modify those glissando lines (e.g. move one of them slightly
lower), how would I go about doing that without affecting the other two?

/\relative c''' {
        \once \override Glissando.extra-offset = #'(0 . -1)
        <a'' bes c>1 \glissando <c, d e>1
}
/ affects all of them (of course), as does:

/<a'' bes c>1 -\tweak extra-offset #'(0 . -1) \glissando <c, d e>1/

/<a'' \tweak extra-offset #'(0 . -1) bes c>1 \glissando <c, d e>1/
moves the note itself, but

/<a'' \tweak Glissando.extra-offset #'(0 . -1) bes c>1 \glissando <c, d e>1/
has no effect.

What is the correct syntax for accessing the individual Glissando lines
separately?

Cheers everyone!

Dominic



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