### Question:
CallbackDescriptor implements Serializable { public LifecycleEvent getCallbackType() { return callbackType; } CallbackDescriptor(LifecycleEvent callbackType); void clear(); Collection<String> getCallbackMethods(); void addCallbackMethod(String methodName); void removeCallbackMethod(String methodName); LifecycleEvent getCallbackType(); boolean moveMethod(String callbackMethod, int destinationIndex); void setCallbackMethodAt(int index, String method);  }### Answer:
@Test public void testConstructor() { CallbackDescriptor m = new CallbackDescriptor(LifecycleEvent.POST_LOAD); assertEquals(LifecycleEvent.POST_LOAD, m.getCallbackType()); }