Was this notification shown with show?

This does not indicates whether is has been dismissed or not. Only that it was shown at least once.

Property definitions

android $ Notification :: was_shown
	# Was this notification shown with `show`?
	#
	# This does not indicates whether is has been dismissed or not. Only that
	# it was shown at least once.
	private fun was_shown: Bool do return id != null
lib/android/notification/notification.nit:99,2--103,49