https://www.graalvm.org/ 
public final class com.oracle.truffle.js.runtime.builtins.JSAdapterObject extends com.oracle.truffle.js.runtime.objects.JSClassObject
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.runtime.builtins.JSAdapterObject
  super_class: com.oracle.truffle.js.runtime.objects.JSClassObject
{
  private final com.oracle.truffle.api.object.DynamicObject adaptee;
    descriptor: Lcom/oracle/truffle/api/object/DynamicObject;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final com.oracle.truffle.api.object.DynamicObject overrides;
    descriptor: Lcom/oracle/truffle/api/object/DynamicObject;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  protected void <init>(com.oracle.truffle.api.object.Shape, com.oracle.truffle.api.object.DynamicObject, com.oracle.truffle.api.object.DynamicObject);
    descriptor: (Lcom/oracle/truffle/api/object/Shape;Lcom/oracle/truffle/api/object/DynamicObject;Lcom/oracle/truffle/api/object/DynamicObject;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
        start local 1 // com.oracle.truffle.api.object.Shape shape
        start local 2 // com.oracle.truffle.api.object.DynamicObject adaptee
        start local 3 // com.oracle.truffle.api.object.DynamicObject overrides
         0: .line 57
            aload 0 /* this */
            aload 1 /* shape */
            invokespecial com.oracle.truffle.js.runtime.objects.JSClassObject.<init>:(Lcom/oracle/truffle/api/object/Shape;)V
         1: .line 58
            aload 0 /* this */
            aload 2 /* adaptee */
            putfield com.oracle.truffle.js.runtime.builtins.JSAdapterObject.adaptee:Lcom/oracle/truffle/api/object/DynamicObject;
         2: .line 59
            aload 0 /* this */
            aload 3 /* overrides */
            putfield com.oracle.truffle.js.runtime.builtins.JSAdapterObject.overrides:Lcom/oracle/truffle/api/object/DynamicObject;
         3: .line 60
            return
        end local 3 // com.oracle.truffle.api.object.DynamicObject overrides
        end local 2 // com.oracle.truffle.api.object.DynamicObject adaptee
        end local 1 // com.oracle.truffle.api.object.Shape shape
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    4     0       this  Lcom/oracle/truffle/js/runtime/builtins/JSAdapterObject;
            0    4     1      shape  Lcom/oracle/truffle/api/object/Shape;
            0    4     2    adaptee  Lcom/oracle/truffle/api/object/DynamicObject;
            0    4     3  overrides  Lcom/oracle/truffle/api/object/DynamicObject;
    MethodParameters:
           Name  Flags
      shape      
      adaptee    
      overrides  

  public com.oracle.truffle.api.object.DynamicObject getAdaptee();
    descriptor: ()Lcom/oracle/truffle/api/object/DynamicObject;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
         0: .line 63
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSAdapterObject.adaptee:Lcom/oracle/truffle/api/object/DynamicObject;
            areturn
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/builtins/JSAdapterObject;

  public com.oracle.truffle.api.object.DynamicObject getOverrides();
    descriptor: ()Lcom/oracle/truffle/api/object/DynamicObject;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
         0: .line 67
            aload 0 /* this */
            getfield com.oracle.truffle.js.runtime.builtins.JSAdapterObject.overrides:Lcom/oracle/truffle/api/object/DynamicObject;
            areturn
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/builtins/JSAdapterObject;

  public boolean hasMetaObject();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
         0: .line 73
            iconst_1
            ireturn
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/builtins/JSAdapterObject;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()

  public java.lang.Object getMetaObject();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
         0: .line 79
            getstatic com.oracle.truffle.js.runtime.interop.JSMetaType.JS_PROXY:Lcom/oracle/truffle/js/runtime/interop/JSMetaType;
            areturn
        end local 0 // com.oracle.truffle.js.runtime.builtins.JSAdapterObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/runtime/builtins/JSAdapterObject;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
}
SourceFile: "JSAdapterObject.java"
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportLibrary(value = Lcom/oracle/truffle/api/interop/InteropLibrary;)