https://www.graalvm.org/ 
public final class com.oracle.truffle.js.test.polyglot.ForeignBoxedObject 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.ForeignBoxedObject
  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

  final java.lang.Object value;
    descriptor: Ljava/lang/Object;
    flags: (0x0010) ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 51
            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.ForeignBoxedObject.SHAPE:Lcom/oracle/truffle/api/object/Shape;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.test.polyglot.ForeignBoxedObject this
        start local 1 // java.lang.Object value
         0: .line 56
            aload 0 /* this */
            getstatic com.oracle.truffle.js.test.polyglot.ForeignBoxedObject.SHAPE:Lcom/oracle/truffle/api/object/Shape;
            invokespecial com.oracle.truffle.api.object.DynamicObject.<init>:(Lcom/oracle/truffle/api/object/Shape;)V
         1: .line 57
            aload 0 /* this */
            aload 1 /* value */
            putfield com.oracle.truffle.js.test.polyglot.ForeignBoxedObject.value:Ljava/lang/Object;
         2: .line 58
            return
        end local 1 // java.lang.Object value
        end local 0 // com.oracle.truffle.js.test.polyglot.ForeignBoxedObject this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/oracle/truffle/js/test/polyglot/ForeignBoxedObject;
            0    3     1  value  Ljava/lang/Object;
    MethodParameters:
       Name  Flags
      value  

  public static com.oracle.truffle.api.object.DynamicObject createNew(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Lcom/oracle/truffle/api/object/DynamicObject;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // java.lang.Object value
         0: .line 61
            new com.oracle.truffle.js.test.polyglot.ForeignBoxedObject
            dup
            aload 0 /* value */
            invokespecial com.oracle.truffle.js.test.polyglot.ForeignBoxedObject.<init>:(Ljava/lang/Object;)V
            areturn
        end local 0 // java.lang.Object value
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  value  Ljava/lang/Object;
    MethodParameters:
       Name  Flags
      value  

  public java.lang.Object getValue();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.test.polyglot.ForeignBoxedObject this
         0: .line 65
            aload 0 /* this */
            getfield com.oracle.truffle.js.test.polyglot.ForeignBoxedObject.value:Ljava/lang/Object;
            areturn
        end local 0 // com.oracle.truffle.js.test.polyglot.ForeignBoxedObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/test/polyglot/ForeignBoxedObject;
}
SourceFile: "ForeignBoxedObject.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;, delegateTo = "value")