src/bosh-softlayer-cpi/softlayer/client/client.go
func (c *ClientManager) RestoreFromSnapshot(volumeId int, snapshotId int) error {
	_, err := c.StorageService.Id(volumeId).RestoreFromSnapshot(sl.Int(snapshotId))
	return err
}
func (c *ClientManager) RestoreFromSnapshot(volumeId int, snapshotId int) error {
	_, err := c.StorageService.Id(volumeId).RestoreFromSnapshot(sl.Int(snapshotId))
	return err
}
// Restores a specific volume from a snapshot.
// volumeId: The id of the volume
// snapshotId: The id of the restore point