type ReleaseLevelError struct {
    message string
}

func (e ReleaseLevelError) Error() string {
    return fmt.Sprintf("%s", e.message)
}

var ReleaseLevelErrorDatabase = &ReleaseLevelError{"got nil value from database for ReleaseLevel for volume"}
var ReleaseLevelErrorScan = &ReleaseLevelError{"failed to scan ReleaseLevel"}

func Test_error() error {
    test := errors.New("test")
    fmt.Println(reflect.TypeOf(test))
    return ReleaseLevelErrorScan
}