fun ==(o: nullable Object): Bool do return self.is_same_instance(o)
fun !=(o: nullable Object): Bool do return not self.is_same_instance(o)
fun is_same_instance(other: nullable Object): Bool is intern
fun ==(o: nullable Object): Bool do return self.is_same_instance(o)
fun !=(o: nullable Object): Bool do return not self.is_same_instance(o)
fun is_same_instance(other: nullable Object): Bool is intern