Override a StaffSymbol property outside \new Staff { ... } context

[Paolo Prete]

Hello,

is it possible to override a property of StaffSymbol outside a 

 \new Staff \with { ... }  

context?

I would like to obtain something like:

%%%%%%%%%%%%%%%%%%%

#scheme-code-for-overriding-staffsymbol-for-all-the-staves-in-the-score

{

  c' c' c' c'

}

%%%%%%%%%%%%%%%%%%%

Thanks