+ * This filter will only accept {@link WorldObject} which were not in vision
+ * of object when it was positioned at old and are visible
+ * now.
+ *
+ * @param object
+ * the object in the center of the range
+ * @param old
+ * the old position
+ */
@SuppressWarnings("unchecked")
public KnownListUpdateFilter(PositionableObject object, Point3D old) {
super(new KnownListFilter(object), new NotFilter