),
	}
	if err := ret.loadCertKeyPair(); err != nil {
		return nil, err
	}

	return ret, nil
}

// AddListener adds a listener to be notified when the serving cert content changes.
func (c *DynamicCertKeyPairContent) AddListener(listener Listener) {
	c.listeners = append(c.listeners, listener)
}

// loadCertKeyPair determines the next set of content for the file.