package errors

type NotExistError struct {
    query string
}
func NewNotExistError(query string) *NotExistError {
    return &NotExistError{ query: query }
}
func (err *NotExistError) Error() string {
    return err.query
}
func IsNotExistError(err error) bool {
    _, ok := err.(*NotExistError)
    return ok
}