package errors import "fmt" type NotFound interface { error IsNotFound() } type NotFoundError struct { *CaosError } func ThrowNotFound(parent error, id, message string) error { return &NotFoundError{CreateCaosError(parent, id, message)} } func ThrowNotFoundf(parent error, id, format string, a ...interface{}) error { return ThrowNotFound(parent, id, fmt.Sprintf(format, a...)) } func (err *NotFoundError) IsNotFound() {} func IsNotFound(err error) bool { _, ok := err.(NotFound) return ok }