glibmm  2.55.2
New API in glibmm 2.56
Member Glib::ustring::compose (const ustring& fmt, const Ts&... args)
Member Glib::ustring::format (const Ts&... args)
Member Glib::VariantBase::operator!= (const VariantBase& other) const
Member Glib::VariantBase::operator== (const VariantBase& other) const