Checker Framework 3.23.0-eisop2

Version 3.23.0-eisop2 (July 22, 2022)

Implementation details:

Improved defaulting in stub files:
As an extension to the fix for #270, we now allow internally parsing
multiple stub files at the same time. This should make AnnotatedTypeFactory.getDeclAnnotations
return the expected declaration annotations for all kinds of elements,
even if it is parsing a different stub file.

Closed issues:

#308.