# The application is launching, restore its state from a previous `on_save_state`
	#
	# Triggers are platform specific:
	# * Android: `Activity.onCreate`, _not_ `Activity.onRestoreInstanceState`
	#   as it is trigged only if there is a previous Android specific save state.
	# * iOS: `UIApplicationDelegate applicationDidEnterBackground`
	fun on_restore_state do end