/**
  * Make sure that a lease was really acquired properly.
  *
  * @param DrydockBlueprint Blueprint which created the resource.
  * @param DrydockResource Resource which was acquired.
  * @param DrydockLease The lease which was supposedly acquired.
  * @return void
  * @task acquire
  */
 private function validateAcquiredLease(DrydockBlueprint $blueprint, DrydockResource $resource, DrydockLease $lease)
 {
     if (!$lease->isAcquiredLease()) {
         throw new Exception(pht('Blueprint "%s" (of type "%s") is not properly implemented: it ' . 'returned from "%s" without acquiring a lease.', $blueprint->getBlueprintName(), $blueprint->getClassName(), 'acquireLease()'));
     }
     $lease_phid = $lease->getResourcePHID();
     $resource_phid = $resource->getPHID();
     if ($lease_phid !== $resource_phid) {
         throw new Exception(pht('Blueprint "%s" (of type "%s") is not properly implemented: it ' . 'returned from "%s" with a lease acquired on the wrong resource.', $blueprint->getBlueprintName(), $blueprint->getClassName(), 'acquireLease()'));
     }
 }