| animator | 播放此状态机的 Animator。 |
| stateMachinePathHash | 此状态机的完整路径哈希。 |
当转出 StateMachine 时，在最后一个 Update 帧上进行调用。当过渡到 StateMachine 子状态时，不进行调用。
The evaluation flow must pass through an Entry node to call this method. Adding this callback prevents the multithreaded state machine evaluation because a script method needs to be called during the state machine evaluation. This method is called while the state machine is being evaluated which is a different execution order compared to most StateMachineBehaviour methods.