# Is `self` null in Java?
	#
	# Since Java type system doesn't have the same `nullable` concept as Nit's,
	# the two systems are not directly compatible. Any Nit instances of
	# `JavaObject` may hold a Java null.
	#
	# To benefit from the safer type system of Nit, it is recommended to check
	# the return of all extern methods implemented in Java to ensure the value
	# is not a Java null. In case it is, you should replace it by a normal Nit
	# `null`.
	fun is_java_null: Bool in "Java" `{ return self == null; `}