https://www.graalvm.org/ 
class com.oracle.truffle.trufflenode.GraalJSAccess$4 extends com.oracle.truffle.js.runtime.JavaScriptRootNode
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.trufflenode.GraalJSAccess$4
  super_class: com.oracle.truffle.js.runtime.JavaScriptRootNode
{
  final com.oracle.truffle.trufflenode.GraalJSAccess this$0;
    descriptor: Lcom/oracle/truffle/trufflenode/GraalJSAccess;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.trufflenode.GraalJSAccess);
    descriptor: (Lcom/oracle/truffle/trufflenode/GraalJSAccess;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.trufflenode.GraalJSAccess$4 this
         0: .line 2622
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.trufflenode.GraalJSAccess$4.this$0:Lcom/oracle/truffle/trufflenode/GraalJSAccess;
            aload 0 /* this */
            invokespecial com.oracle.truffle.js.runtime.JavaScriptRootNode.<init>:()V
            return
        end local 0 // com.oracle.truffle.trufflenode.GraalJSAccess$4 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/trufflenode/GraalJSAccess$4;
    MethodParameters:
        Name  Flags
      this$0  final

  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=1, locals=2, args_size=2
        start local 0 // com.oracle.truffle.trufflenode.GraalJSAccess$4 this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame vf
         0: .line 2625
            getstatic com.oracle.truffle.js.runtime.objects.Undefined.instance:Lcom/oracle/truffle/js/runtime/objects/JSDynamicObject;
            areturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame vf
        end local 0 // com.oracle.truffle.trufflenode.GraalJSAccess$4 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/trufflenode/GraalJSAccess$4;
            0    1     1    vf  Lcom/oracle/truffle/api/frame/VirtualFrame;
    MethodParameters:
      Name  Flags
      vf    
}
SourceFile: "GraalJSAccess.java"
EnclosingMethod: com.oracle.truffle.trufflenode.GraalJSAccess.initializeExtrasBindingObject:(Lcom/oracle/truffle/js/runtime/JSRealm;)Lcom/oracle/truffle/api/object/DynamicObject;
NestHost: com.oracle.truffle.trufflenode.GraalJSAccess
InnerClasses:
  com.oracle.truffle.trufflenode.GraalJSAccess$4