https://www.graalvm.org/ 
class com.oracle.truffle.api.test.interop.InteropDefaultsTest$4 implements com.oracle.truffle.api.interop.TruffleObject
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.test.interop.InteropDefaultsTest$4
  super_class: java.lang.Object
{
  final com.oracle.truffle.api.test.interop.InteropDefaultsTest this$0;
    descriptor: Lcom/oracle/truffle/api/test/interop/InteropDefaultsTest;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.api.test.interop.InteropDefaultsTest);
    descriptor: (Lcom/oracle/truffle/api/test/interop/InteropDefaultsTest;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.test.interop.InteropDefaultsTest$4 this
         0: .line 485
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.api.test.interop.InteropDefaultsTest$4.this$0:Lcom/oracle/truffle/api/test/interop/InteropDefaultsTest;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.test.interop.InteropDefaultsTest$4 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/test/interop/InteropDefaultsTest$4;
    MethodParameters:
        Name  Flags
      this$0  final
}
SourceFile: "InteropDefaultsTest.java"
EnclosingMethod: com.oracle.truffle.api.test.interop.InteropDefaultsTest.testExceptionDefaults:()V
NestHost: com.oracle.truffle.api.test.interop.InteropDefaultsTest
InnerClasses:
  com.oracle.truffle.api.test.interop.InteropDefaultsTest$4