Get Behavior to update properties in Editor

How do I get the value of N to update in the editor?

Code (CSharp):

1. [System.Serializable]
2.     public class IncrementPlayableBehavior : PlayableBehaviour
3.     {
4.         public int n;
5.  
6.         public override void ProcessFrame(Playable playable, FrameData info, object playerData)
7.         {
8.             n = n + 1;
9.         }
10.  
11.     }
12.  
13.     [System.Serializable]
14.     public class IncrementClip : PlayableAsset
15.     {
16.         public IncrementPlayableBehavior incrementPlayableBehaviorTemplate = new IncrementPlayableBehavior();
17.  
18.         public override Playable CreatePlayable(PlayableGraph graph, GameObject go)
19.         {
20.             return ScriptPlayable<IncrementPlayableBehavior>.Create(graph, incrementPlayableBehaviorTemplate);
21.         }
22.     }

Code (CSharp):

1. [CustomEditor(typeof(IncrementClip))]
2.     public class IncrementClipEditor : Editor
3.     {
4.         private SerializedProperty n;
5.  
6.         private void OnEnable()
7.         {
8.             n = serializedObject.FindProperty("incrementPlayableBehaviorTemplate.n");
9.         }
10.  
11.         public override void OnInspectorGUI()
12.         {
13.             serializedObject.Update();
14.  
15.             EditorGUILayout.PropertyField(n);
16.  
17.             serializedObject.ApplyModifiedProperties();
18.         }
19.     }

Do I just want to set a public variable in my asset that stores the behavior attached to the playable?