glibmm: New API in glibmm 2.12

glibmm 2.80.1

New API in glibmm 2.12

Member Glib::KeyFile::set_double (const Glib::ustring & group_name, const Glib::ustring & key, double value)
Member Glib::KeyFile::set_double (const Glib::ustring & key, double value)
Member Glib::OptionContext::get_description () const
Member Glib::OptionContext::get_summary () const
Member Glib::OptionContext::set_description (const Glib::ustring & description)
Member Glib::OptionContext::set_summary (const Glib::ustring & summary)
Member Glib::OptionContext::set_translation_domain (const Glib::ustring & domain)