const reflect.BothDir

4 uses

	reflect (current package)
		type.go#L373: 	BothDir = RecvDir | SendDir             // chan
		type.go#L1037: 	case BothDir:
		type.go#L1865: 	case BothDir:
		value.go#L3083: 	if typ.ChanDir() != BothDir {