https://www.graalvm.org/ 
class com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode extends com.oracle.truffle.api.nodes.RootNode
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode
  super_class: com.oracle.truffle.api.nodes.RootNode
{
  com.oracle.truffle.api.nodes.NodeSnippets$1InstrumentableLanguageNode child;
    descriptor: Lcom/oracle/truffle/api/nodes/NodeSnippets$1InstrumentableLanguageNode;
    flags: (0x0000) 
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Child()

  protected void <init>(com.oracle.truffle.api.nodes.NodeSnippets$1MyLanguage);
    descriptor: (Lcom/oracle/truffle/api/nodes/NodeSnippets$1MyLanguage;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode this
        start local 1 // com.oracle.truffle.api.nodes.NodeSnippets$1MyLanguage language
         0: .line 938
            aload 0 /* this */
            aload 1 /* language */
            invokespecial com.oracle.truffle.api.nodes.RootNode.<init>:(Lcom/oracle/truffle/api/TruffleLanguage;)V
         1: .line 939
            return
        end local 1 // com.oracle.truffle.api.nodes.NodeSnippets$1MyLanguage language
        end local 0 // com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lcom/oracle/truffle/api/nodes/NodeSnippets$1MyRootNode;
            0    2     1  language  Lcom/oracle/truffle/api/nodes/NodeSnippets$1MyLanguage;
    MethodParameters:
          Name  Flags
      language  

  public java.lang.Object execute(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 945
            aload 0 /* this */
            getfield com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode.child:Lcom/oracle/truffle/api/nodes/NodeSnippets$1InstrumentableLanguageNode;
            ifnonnull 4
         1: .line 946
            invokestatic com.oracle.truffle.api.CompilerDirectives.transferToInterpreterAndInvalidate:()V
         2: .line 947
            aload 0 /* this */
            aload 0 /* this */
            new com.oracle.truffle.api.nodes.NodeSnippets$1InstrumentableLanguageNode
            dup
            invokespecial com.oracle.truffle.api.nodes.NodeSnippets$1InstrumentableLanguageNode.<init>:()V
            invokevirtual com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode.insert:(Lcom/oracle/truffle/api/nodes/Node;)Lcom/oracle/truffle/api/nodes/Node;
            checkcast com.oracle.truffle.api.nodes.NodeSnippets$1InstrumentableLanguageNode
            putfield com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode.child:Lcom/oracle/truffle/api/nodes/NodeSnippets$1InstrumentableLanguageNode;
         3: .line 948
            aload 0 /* this */
            aload 0 /* this */
            getfield com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode.child:Lcom/oracle/truffle/api/nodes/NodeSnippets$1InstrumentableLanguageNode;
            invokevirtual com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode.notifyInserted:(Lcom/oracle/truffle/api/nodes/Node;)V
         4: .line 950
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode.child:Lcom/oracle/truffle/api/nodes/NodeSnippets$1InstrumentableLanguageNode;
            aload 1 /* frame */
            invokevirtual com.oracle.truffle.api.nodes.NodeSnippets$1InstrumentableLanguageNode.execute:(Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
            areturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    5     0   this  Lcom/oracle/truffle/api/nodes/NodeSnippets$1MyRootNode;
            0    5     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    MethodParameters:
       Name  Flags
      frame  
}
SourceFile: "Node.java"
EnclosingMethod: com.oracle.truffle.api.nodes.NodeSnippets.notifyInserted:()V
NestHost: com.oracle.truffle.api.nodes.NodeSnippets
InnerClasses:
  public abstract Child = com.oracle.truffle.api.nodes.Node$Child of com.oracle.truffle.api.nodes.Node
  InstrumentableLanguageNode = com.oracle.truffle.api.nodes.NodeSnippets$1InstrumentableLanguageNode
  MyLanguage = com.oracle.truffle.api.nodes.NodeSnippets$1MyLanguage
  MyRootNode = com.oracle.truffle.api.nodes.NodeSnippets$1MyRootNode