Git ignore all files of a certain type except in all subdirectories of a certain directory?

https://stackoverflow.com/questions/22537528/git-ignore-all-files-of-a-certain-type-except-in-all-subdirectories-of-a-certain/22537704#22537704

# Package Files #
*.jar
*.war
*.nar
*.ear
*.tar.gz
*.rar


#Exceptions to File Types based on Locations
!LB/**/*.jar