code: public void updated(final UUID lastupdatedByEntityId) {
  		if (this.entityId == null) {
  			throw new IllegalStateException("The entity has not yet been created : entityId == null");
  		}
  		Assert.notNull(lastupdatedByEntityId, "lastupdatedByEntityId is required");
  		entityVersion++;
  		updatedByEntityId = lastupdatedByEntityId;
  		entityUpdatedOn = System.currentTimeMillis();
  	}
docs: Call this method when the entity is updated before it is persisted to increment its version and update its lastupdatedByEntityId
  
  @param lastupdatedByEntityId
  REQUIRED