lxd/db/images.go
func (c *Cluster) ImageLastAccessUpdate(fingerprint string, date time.Time) error {
	stmt := `UPDATE images SET last_use_date=? WHERE fingerprint=?`
	err := exec(c.db, stmt, date, fingerprint)
	return err
}
func (c *Cluster) ImageLastAccessUpdate(fingerprint string, date time.Time) error {
	stmt := `UPDATE images SET last_use_date=? WHERE fingerprint=?`
	err := exec(c.db, stmt, date, fingerprint)
	return err
}
// ImageLastAccessUpdate updates the last_use_date field of the image with the
// given fingerprint.