rv := reflect.ValueOf(fieldValue)
	switch v := fieldValue.(type) {
	case int64, int, uint, uint64, int32, uint32, int16, uint16:
		result = time.Unix(reflect.Indirect(rv).Int(), 0).UTC()
	case *int64, *int, *uint, *uint64, *int32, *uint32, *int16, *uint16:
		if rv.IsZero() {
			return nil, nil
		}
		result = time.Unix(reflect.Indirect(rv).Int(), 0).UTC()
	default:

// RegEx matches only numeric values
var numericPlaceholderRe = regexp.MustCompile(`\$\d+\$`)

func isNumeric(k reflect.Kind) bool {
	switch k {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return true
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		return true
	case reflect.Float32, reflect.Float64:
		return true
	default:

func ToString(value interface{}) string {
	switch v := value.(type) {
	case string:
		return v
	case int:
		return strconv.FormatInt(int64(v), 10)
	case int8:
		return strconv.FormatInt(int64(v), 10)
	case int16:
		return strconv.FormatInt(int64(v), 10)
	case int32:
		return strconv.FormatInt(int64(v), 10)
	case int64:
		return strconv.FormatInt(v, 10)
	case uint:
		return strconv.FormatUint(uint64(v), 10)

func TestToString(t *testing.T) {
	tests := []struct {
		name string
		in   interface{}
		out  string
	}{
		{"int", math.MaxInt64, "9223372036854775807"},
		{"int8", int8(math.MaxInt8), "127"},
		{"int16", int16(math.MaxInt16), "32767"},
		{"int32", int32(math.MaxInt32), "2147483647"},
		{"int64", int64(math.MaxInt64), "9223372036854775807"},
		{"uint", uint(math.MaxUint64), "18446744073709551615"},