Add a method that returns a value as std::string
Add a method that returns a value as std::string

rpm-software-management/libdnf,rpm-software-management/libhif,Conan-Kudo/libhif,rpm-software-management/libhif,hughsie/libhif,hughsie/libhif,rpm-software-management/libdnf,rpm-software-management/libdnf,rpm-software-management/libdnf,Conan-Kudo/libhif,hughsie/libhif,hughsie/libhif,rpm-software-management/libhif,Conan-Kudo/libhif,rpm-software-management/libhif,Conan-Kudo/libhif