* http://community.abiquo.com/display/ABI20/TierResource#TierResource-
* Retrievethelistoftiers </a>
* @return List of tiers in the datacenter using this device.
*/
public Iterable<Tier> listTiersFromDatacenter() {
DatacenterDto datacenter;
if (this.datacenter == null) {
datacenter = new DatacenterDto();
datacenter.setId(target.getIdFromLink(ParentLinkName.DATACENTER));
} else {
datacenter = this.getDatacenter().unwrap();
}
TiersDto dto = context.getApi().getInfrastructureApi().listTiers(datacenter);