Playable タイムラインによって生成されます。
| OnBehaviourPause | This function is called when the Playable play state is changed to PlayState.Paused. |
| OnBehaviourPlay | This function is called when the Playable play state is changed to PlayState.Playing. |
| OnGraphStart | This function is called when the PlayableGraph that owns this PlayableBehaviour starts. |
| OnGraphStop | This function is called when the PlayableGraph that owns this PlayableBehaviour stops. |
| OnPlayableCreate | This function is called when the Playable that owns the PlayableBehaviour is created. |
| OnPlayableDestroy | This function is called when the Playable that owns the PlayableBehaviour is destroyed. |
| PrepareFrame | This function is called during the PrepareFrame phase of the PlayableGraph. |
| ProcessFrame | This function is called during the ProcessFrame phase of the PlayableGraph. |