docs: public void create(final String identifier, final ServerSideConfiguration config)
      throws EntityAlreadyExistsException, ClusterTierManagerCreationException, EntityBusyException {
  
      Hold existingMaintenance = maintenanceHolds.get(identifier);
  
      try(Hold localMaintenance = (existingMaintenance == null ? createAccessLockFor(identifier).tryWriteLock() : null)) {
        if (localMaintenance == null && existingMaintenance == null) {
          throw new EntityBusyException("Unable to obtain maintenance lease for " + identifier);
        }
  
        EntityRef<ClusterTierManagerClientEntity, ClusterTierManagerConfiguration, ClusterTierUserData> ref = getEntityRef(identifier);
        try {
          ref.create(new ClusterTierManagerConfiguration(identifier, config));
        } catch (EntityConfigurationException e) {
          throw new ClusterTierManagerCreationException("Unable to configure cluster tier manager for id " + identifier, e);
        } catch (EntityNotProvidedException | EntityVersionMismatchException e) {
          LOGGER.error("Unable to create cluster tier manager for id {}", identifier, e);
          throw new AssertionError(e);
        }
      }
    }