https://www.graalvm.org/ 
abstract class com.oracle.truffle.api.dsl.test.ReachabilityTest$ReachabilityUncached extends com.oracle.truffle.api.nodes.Node
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.api.dsl.test.ReachabilityTest$ReachabilityUncached
  super_class: com.oracle.truffle.api.nodes.Node
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.dsl.test.ReachabilityTest$ReachabilityUncached this
         0: .line 307
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.nodes.Node.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.dsl.test.ReachabilityTest$ReachabilityUncached this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/dsl/test/ReachabilityTest$ReachabilityUncached;

  abstract int execute();
    descriptor: ()I
    flags: (0x0400) ACC_ABSTRACT

  int foo();
    descriptor: ()I
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.dsl.test.ReachabilityTest$ReachabilityUncached this
         0: .line 311
            iconst_0
            ireturn
        end local 0 // com.oracle.truffle.api.dsl.test.ReachabilityTest$ReachabilityUncached this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/dsl/test/ReachabilityTest$ReachabilityUncached;
}
SourceFile: "ReachabilityTest.java"
NestHost: com.oracle.truffle.api.dsl.test.ReachabilityTest
InnerClasses:
  abstract ReachabilityUncached = com.oracle.truffle.api.dsl.test.ReachabilityTest$ReachabilityUncached of com.oracle.truffle.api.dsl.test.ReachabilityTest