var encoding/json.numberType

4 uses

	encoding/json (current package)
		decode.go#L843: var numberType = reflect.TypeOf(Number(""))
		decode.go#L952: 			if v.Type() == numberType && !isValidNumber(string(s)) {
		decode.go#L974: 			if v.Kind() == reflect.String && v.Type() == numberType {
		encode.go#L620: 	if v.Type() == numberType {