static Spring standard_breakable_column_spacing (Grob *me, Item *l, Item *r, Spacing_options const *);
DECLARE_SCHEME_CALLBACK (set_springs, (SCM));
static Spring standard_breakable_column_spacing (Grob *me, Item *l, Item *r, Spacing_options const *);
DECLARE_SCHEME_CALLBACK (set_springs, (SCM));