Method MapDefault

src/newgrf/newgrf_act3.cpp:207–219

	}

	void MapDefault(uint16_t local_id, const SpriteGroup *group) override
	{
		if (T *spec = GetSpec<T>(_cur_gps.grffile, local_id); spec == nullptr) {
			GrfMsg(1, "MapSpriteGroup: {} undefined, skipping", local_id);
		} else if (spec->grf_prop.HasGrfFile()) {
			GrfMsg(1, "MapSpriteGroup: {} mapped multiple times, skipping", local_id);
		} else {
			spec->grf_prop.SetSpriteGroup(CargoGRFFileProps::SG_DEFAULT, group);
			spec->grf_prop.SetGRFFile(_cur_gps.grffile);
			spec->grf_prop.local_id = local_id;
			Tclass::Assign(spec);
		}
	}
};

struct CanalMapSpriteGroupHandler : MapSpriteGroupHandler {