Function called when the screen is hidden by the screen manager It is expected that screens override this function if required, to handle focus any actions required on the screen being hidden

Function called when the screen is displayed by the screen manager It is expected that screens override this function to handle focus managmenet and any other actions required on screen shown

Function called when the screen is being permanently removed by SceneManager Override this to clean up resources: task nodes, observers, large data structures Parent components are responsible for calling destroy() on children that need it