On this pageSceneActivationContext <TData, TPreviousSceneData>Type parametersTData = undefinedTPreviousSceneData = undefinedIndex PropertiesdataenginenextScenepreviousScenepreviousSceneDataProperties optionaldatadata?: TDataengineengine: EnginenextScenenextScene: ScenepreviousScenepreviousScene: SceneoptionalpreviousSceneDatapreviousSceneData?: TPreviousSceneData