https://www.graalvm.org/ 
class com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode extends com.oracle.truffle.api.nodes.RootNode
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode
  super_class: com.oracle.truffle.api.nodes.RootNode
{
  private final int argumentIndex;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(int);
    descriptor: (I)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode this
        start local 1 // int argumentIndex
         0: .line 171
            aload 0 /* this */
            aconst_null
            invokespecial com.oracle.truffle.api.nodes.RootNode.<init>:(Lcom/oracle/truffle/api/TruffleLanguage;)V
         1: .line 172
            aload 0 /* this */
            iload 1 /* argumentIndex */
            putfield com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode.argumentIndex:I
         2: .line 173
            return
        end local 1 // int argumentIndex
        end local 0 // com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    3     0           this  Lcom/oracle/truffle/api/dsl/test/examples/ExampleNode$DummyCallRootNode;
            0    3     1  argumentIndex  I
    MethodParameters:
               Name  Flags
      argumentIndex  

  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=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 177
            aload 1 /* frame */
            invokeinterface com.oracle.truffle.api.frame.VirtualFrame.getArguments:()[Ljava/lang/Object;
            aload 0 /* this */
            getfield com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode.argumentIndex:I
            aaload
            areturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/oracle/truffle/api/dsl/test/examples/ExampleNode$DummyCallRootNode;
            0    1     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    MethodParameters:
       Name  Flags
      frame  

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode this
         0: .line 182
            new java.lang.StringBuilder
            dup
            ldc "DummyRootNode[arg = "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode.argumentIndex:I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            ldc "]"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/dsl/test/examples/ExampleNode$DummyCallRootNode;
}
SourceFile: "ExampleNode.java"
NestHost: com.oracle.truffle.api.dsl.test.examples.ExampleNode
InnerClasses:
  private DummyCallRootNode = com.oracle.truffle.api.dsl.test.examples.ExampleNode$DummyCallRootNode of com.oracle.truffle.api.dsl.test.examples.ExampleNode