master
8227046: compiler implementation for sealed classes 8225056: VM support for sealed classes 8227044: javax.lang.model for sealed classes 8227045: Preview APIs support for sealed classes 8227047: Javadoc for sealed types 8245854: JVM TI Specification for sealed classes
8231461: static/instance overload leads to 'unexpected static method found in unbound lookup' when resolving method reference