# The application just left foreground it can be suspended at any time
	#
	# Redef this method to release shared resources, save user data,
	# invalidate timers, and store application state to restore your
	# application to its current state in case it is terminated later.
	#
	# If your application supports background execution, this method
	# is called instead of `will_terminate` when the user quits.
	fun did_enter_background
	do
		on_save_state
		on_stop
	end