https://www.graalvm.org/ 
class com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode extends com.oracle.truffle.api.nodes.Node implements com.oracle.truffle.api.instrumentation.InstrumentableNode
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode
  super_class: com.oracle.truffle.api.nodes.Node
{
  private final com.oracle.truffle.api.source.SourceSection sourceSection;
    descriptor: Lcom/oracle/truffle/api/source/SourceSection;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(com.oracle.truffle.api.source.SourceSection);
    descriptor: (Lcom/oracle/truffle/api/source/SourceSection;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
        start local 1 // com.oracle.truffle.api.source.SourceSection sourceSection
         0: .line 78
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.nodes.Node.<init>:()V
         1: .line 79
            aload 0 /* this */
            aload 1 /* sourceSection */
            putfield com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode.sourceSection:Lcom/oracle/truffle/api/source/SourceSection;
         2: .line 80
            return
        end local 1 // com.oracle.truffle.api.source.SourceSection sourceSection
        end local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    3     0           this  Lcom/oracle/truffle/api/instrumentation/test/FindSourcesVisitorNestingTest$DummyInstrumentableNode;
            0    3     1  sourceSection  Lcom/oracle/truffle/api/source/SourceSection;
    MethodParameters:
               Name  Flags
      sourceSection  

  void <init>(com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode);
    descriptor: (Lcom/oracle/truffle/api/instrumentation/test/FindSourcesVisitorNestingTest$DummyInstrumentableNode;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
        start local 1 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode copy
         0: .line 82
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.nodes.Node.<init>:()V
         1: .line 83
            aload 0 /* this */
            aload 1 /* copy */
            getfield com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode.sourceSection:Lcom/oracle/truffle/api/source/SourceSection;
            putfield com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode.sourceSection:Lcom/oracle/truffle/api/source/SourceSection;
         2: .line 84
            return
        end local 1 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode copy
        end local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/api/instrumentation/test/FindSourcesVisitorNestingTest$DummyInstrumentableNode;
            0    3     1  copy  Lcom/oracle/truffle/api/instrumentation/test/FindSourcesVisitorNestingTest$DummyInstrumentableNode;
    MethodParameters:
      Name  Flags
      copy  

  public boolean isInstrumentable();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
         0: .line 88
            iconst_1
            ireturn
        end local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/instrumentation/test/FindSourcesVisitorNestingTest$DummyInstrumentableNode;

  public boolean hasTag(java.lang.Class<? extends com.oracle.truffle.api.instrumentation.Tag>);
    descriptor: (Ljava/lang/Class;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
        start local 1 // java.lang.Class tag
         0: .line 93
            aload 1 /* tag */
            ldc Lcom/oracle/truffle/api/instrumentation/StandardTags$StatementTag;
            invokevirtual java.lang.Object.equals:(Ljava/lang/Object;)Z
            ireturn
        end local 1 // java.lang.Class tag
        end local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/instrumentation/test/FindSourcesVisitorNestingTest$DummyInstrumentableNode;
            0    1     1   tag  Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;
    Signature: (Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;)Z
    MethodParameters:
      Name  Flags
      tag   

  public com.oracle.truffle.api.instrumentation.InstrumentableNode$WrapperNode createWrapper(com.oracle.truffle.api.instrumentation.ProbeNode);
    descriptor: (Lcom/oracle/truffle/api/instrumentation/ProbeNode;)Lcom/oracle/truffle/api/instrumentation/InstrumentableNode$WrapperNode;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
         0: .line 98
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tDummyInstrumentableNodeWrapper cannot be resolved to a type\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/instrumentation/test/FindSourcesVisitorNestingTest$DummyInstrumentableNode;
    MethodParameters:
       Name  Flags
      probe  

  public com.oracle.truffle.api.source.SourceSection getSourceSection();
    descriptor: ()Lcom/oracle/truffle/api/source/SourceSection;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
         0: .line 103
            aload 0 /* this */
            getfield com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode.sourceSection:Lcom/oracle/truffle/api/source/SourceSection;
            areturn
        end local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/instrumentation/test/FindSourcesVisitorNestingTest$DummyInstrumentableNode;

  public boolean execute(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 107
            aload 0 /* this */
            invokevirtual com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode.getParent:()Lcom/oracle/truffle/api/nodes/Node;
            instanceof com.oracle.truffle.api.instrumentation.InstrumentableNode$WrapperNode
            ifeq 2
         1: .line 108
            iconst_1
            ireturn
         2: .line 110
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/oracle/truffle/api/instrumentation/test/FindSourcesVisitorNestingTest$DummyInstrumentableNode;
            0    3     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    MethodParameters:
       Name  Flags
      frame  
}
SourceFile: "FindSourcesVisitorNestingTest.java"
NestHost: com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest
InnerClasses:
  public abstract WrapperNode = com.oracle.truffle.api.instrumentation.InstrumentableNode$WrapperNode of com.oracle.truffle.api.instrumentation.InstrumentableNode
  public final StatementTag = com.oracle.truffle.api.instrumentation.StandardTags$StatementTag of com.oracle.truffle.api.instrumentation.StandardTags
  DummyInstrumentableNode = com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest$DummyInstrumentableNode of com.oracle.truffle.api.instrumentation.test.FindSourcesVisitorNestingTest
    RuntimeInvisibleAnnotations: 
      com.oracle.truffle.api.instrumentation.GenerateWrapper()