err := val.Decode(&tmp)
	if err != nil {
		return err
	}

	*p = BatchJobExpirePurge(tmp)
	p.line, p.col = val.Line, val.Column
	return nil
}

// Validate returns nil if value is valid, ie > 0.
func (p BatchJobExpirePurge) Validate() error {
	if p.RetainVersions < 0 {
		return BatchJobYamlErr{
			line: p.line,
			col:  p.col,
			msg:  "retainVersions must be >= 0",
		}
	}
	return nil
}