Is this control in the checked/on state?

Property definitions

app $ CheckBox :: is_checked
	# Is this control in the checked/on state?
	var is_checked = false is writable
lib/app/ui.nit:282,2--283,35

ios :: ui $ CheckBox :: is_checked
	redef fun is_checked do return ui_switch.on
lib/ios/ui/ui.nit:340,2--44

linux :: ui $ CheckBox :: is_checked
	redef fun is_checked do return native.active
lib/linux/ui.nit:324,2--45

android :: ui $ CheckBox :: is_checked
	redef fun is_checked do return native.is_checked
lib/android/ui/ui.nit:272,2--49