1 NotSealedTest.java:11:23: compiler.err.illegal.combination.of.modifiers: sealed, non_sealed
   2 NotSealedTest.java:13:18: compiler.err.illegal.combination.of.modifiers: final, sealed
   3 NotSealedTest.java:15:22: compiler.err.illegal.combination.of.modifiers: final, non_sealed
   4 NotSealedTest.java:19:24: compiler.err.mod.not.allowed.here: sealed
   5 NotSealedTest.java:17:16: compiler.err.non.sealed.with.no.sealed.supertype
   6 5 errors