https://www.graalvm.org/ 
public final class com.oracle.truffle.js.test.polyglot.ForeignDynamicObject extends com.oracle.truffle.api.object.DynamicObject
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.test.polyglot.ForeignDynamicObject
  super_class: com.oracle.truffle.api.object.DynamicObject
{
  private static final com.oracle.truffle.api.object.Shape SHAPE;
    descriptor: Lcom/oracle/truffle/api/object/Shape;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 57
            invokestatic com.oracle.truffle.api.object.Shape.newBuilder:()Lcom/oracle/truffle/api/object/Shape$Builder;
            invokevirtual com.oracle.truffle.api.object.Shape$Builder.build:()Lcom/oracle/truffle/api/object/Shape;
            putstatic com.oracle.truffle.js.test.polyglot.ForeignDynamicObject.SHAPE:Lcom/oracle/truffle/api/object/Shape;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.test.polyglot.ForeignDynamicObject this
         0: .line 60
            aload 0 /* this */
            getstatic com.oracle.truffle.js.test.polyglot.ForeignDynamicObject.SHAPE:Lcom/oracle/truffle/api/object/Shape;
            invokespecial com.oracle.truffle.api.object.DynamicObject.<init>:(Lcom/oracle/truffle/api/object/Shape;)V
         1: .line 61
            return
        end local 0 // com.oracle.truffle.js.test.polyglot.ForeignDynamicObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/js/test/polyglot/ForeignDynamicObject;

  java.lang.Object toDisplayString(boolean);
    descriptor: (Z)Ljava/lang/Object;
    flags: (0x0000) 
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.test.polyglot.ForeignDynamicObject this
        start local 1 // boolean allowSideEffects
         0: .line 66
            ldc "{}"
            areturn
        end local 1 // boolean allowSideEffects
        end local 0 // com.oracle.truffle.js.test.polyglot.ForeignDynamicObject this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    1     0              this  Lcom/oracle/truffle/js/test/polyglot/ForeignDynamicObject;
            0    1     1  allowSideEffects  Z
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
    MethodParameters:
                  Name  Flags
      allowSideEffects  
}
SourceFile: "ForeignDynamicObject.java"
InnerClasses:
  public final Builder = com.oracle.truffle.api.object.Shape$Builder of com.oracle.truffle.api.object.Shape
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportLibrary(value = Lcom/oracle/truffle/api/interop/InteropLibrary;)