void OnDeactivate()
 {
     if (EditorApplication.isPlayingOrWillChangePlaymode && !EditorApplication.isPlaying)
     {
         return;
     }
     EditMode.ChangeEditModeFromToolContext(owner, SceneViewEditMode.None);
 }
 void OnActivate()
 {
     if (EditorApplication.isPlayingOrWillChangePlaymode && !EditorApplication.isPlaying)
     {
         return;
     }
     EditMode.ChangeEditModeFromToolContext(owner, editMode);
 }