1. Checkstyle pull request integrating NonDex. https://github.com/checkstyle/checkstyle/pull/3393. Checkstyle pull request integrating NonDex. https://github.com/checkstyle/checkstyle/pull/3393.
2. Fix internal data ordering. https://github.com/ geosolutions-it/geoserver-manager/commit/5447c06. Fix internal data ordering. https://github.com/ geosolutions-it/geoserver-manager/commit/5447c06.
3. HashSet Javadoc. https://docs.oracle.com/javase/8/ docs/api/java/util/HashSet.html. HashSet Javadoc. https://docs.oracle.com/javase/8/ docs/api/java/util/HashSet.html.
4. Improvements to HashMap/LinkedHashMap use of bins/buckets and trees (red/black) Sept. 2013. http:// hg.openjdk.java.net/jdk8/jdk8/jdk/rev/d62c911aebbb. Improvements to HashMap/LinkedHashMap use of bins/buckets and trees (red/black) Sept. 2013. http:// hg.openjdk.java.net/jdk8/jdk8/jdk/rev/d62c911aebbb.