add context to \score without instantiating a Staff

[Kieren MacMillan]

[ Lilypond 2.9.10 ]

Hello, all --

Just wondering how to insert a context into a \score without  
instantiating a Staff. For example, if I have defined a set of line  
and page breaks in an identifier, e.g.,

   breakSet = { s1 \noBreak s1 \break ... }

how can I then get something like

\score
{
        <<
                \breakSet
                \music
        >>
}

without \breakSet causing a Staff to be spawned?

Thanks,
Kieren.