Is the property defined at the top_level of the module?

Currently such a property are stored in Object

Property definitions

nitc $ MMethod :: _is_toplevel
	# Is the property defined at the top_level of the module?
	# Currently such a property are stored in `Object`
	var is_toplevel: Bool = false is writable
src/model/model.nit:2417,2--2419,42