void OnDestroy() { if (m_TargetBuildingBehaviour) { m_TargetBuildingBehaviour.UnregisterOnInitializedEventHandler(OnInitialized); m_TargetBuildingBehaviour.UnregisterOnFrameQualityChangedEventHandler(OnFrameQualityChanged); m_TargetBuildingBehaviour.UnregisterOnNewTrackableSourceEventHandler(OnNewTrackableSource); } }