(if using a global scope).
+An underscore should be either kept or removed in both usages.
+Related: both the declaration and usage of the `_instance` global / private variable should have the underscore kept or removed (see attached UserNotificationCenter.*).
Currently, the converted declaration keeps underscore:
.. but further usages of this variable do not have the underscore.
Related report (email@example.com):
If a private var is used with an underscore _myVar, don't replace it with myVar.
Update: this is fixed for the case when the variable declaration is known for the converter.
When the variable declaration is unknown (the case with a partial code conversion),
an alternative option is to remove underscores from instance variables only ().
+Related report (firstname.lastname@example.org):
12) "[super description]" in an NSObject subclass was converted to "super._description" which doesn't exist.
+Fixed: see `ShouldTranslateNSObjectDescriptionProperty` test.
Fails and produces the following: