Adapt changes from main repo:
Remove findRT.jar by Natalia Ukhorskaya
Adapt changes from main repo:
Remove @author javadoc by Evgeny Gerashchenko
Adapt changes from main repo:

Detect @NotNull fields
Detect @NotNull reference in call chains
Enum constants are non-nullable
by Andrey Ponomarev
Adapt changes from main repo:

converted enums contain name() method
by Andrey Ponomarev