func (c *sError) Code() string {
	return c.code
}
Code error id
package dot
import "github.com/pkg/errors"
var (
	_ Errorer = (*sError)(nil)
)
type Errorer interface {
	error
	Code() string
	AddNewError(info string) Errorer
}
type sError struct {
	err  error
	code string
}