8245585: Add SourceVersion.RELEASE_16
8245586: Add source 16 and target 16 to javac
8245544: com/sun/tools/javac/platform/JDKPlatformProvider.java does not support ct.sym with platform versions 16+
Co-authored-by: David Holmes <david.holmes@oracle.com>
Co-authored-by: Jan Lahoda <jan.lahoda@oracle.com>
Reviewed-by: erikj, dholmes, ihse, neugens, jjg, jlahoda, jlaskey, mikael
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
Co-authored-by: Harold Seigel <harold.seigel@oracle.com>
Co-authored-by: Jan Lahoda <jan.lahoda@oracle.com>
Reviewed-by: mcimadamore, forax, darcy, dholmes, jlahoda, lfoltan, mchung, sspitsyn, vromero