### Question:
EntityGraph implements ConfigurationChangeListener { @Override public void onChange(Entity oldEntity, Entity newEntity) throws FalconException { onRemove(oldEntity); onAdd(newEntity); } private  EntityGraph(); static EntityGraph get(); Set<Entity> getDependents(Entity entity); @Override void onAdd(Entity entity); @Override void onRemove(Entity entity); @Override void onChange(Entity oldEntity, Entity newEntity); @Override void onReload(Entity entity);  }### Answer:
@Test public void testOnChange() throws Exception { }