type runtime.mapextra

6 uses

	runtime (current package)
		map.go#L130: 	extra *mapextra // optional fields
		map.go#L134: type mapextra struct {
		map.go#L277: 		h.extra = new(mapextra)
		map.go#L332: 			h.extra = new(mapextra)
		map.go#L1039: 		*h.extra = mapextra{}
		map.go#L1092: 			h.extra = new(mapextra)