gtksourceviewmm: New API in gtksourceviewmm 2.4
- Member gtksourceview::SourceView::get_mark_category_background (const Glib::ustring& category, Gdk::Color& dest) const
- Member gtksourceview::SourceView::set_mark_category_background (const Glib::ustring& category, const Gdk::Color& color)
