https://openjdk.java.net/ 
class com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl extends com.sun.tools.jdi.EventSetImpl$EventImpl implements com.sun.jdi.event.ClassUnloadEvent
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl
  super_class: com.sun.tools.jdi.EventSetImpl$EventImpl
{
  private java.lang.String classSignature;
    descriptor: Ljava/lang/String;
    flags: (0x0002) ACC_PRIVATE

  final com.sun.tools.jdi.EventSetImpl this$0;
    descriptor: Lcom/sun/tools/jdi/EventSetImpl;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.sun.tools.jdi.EventSetImpl, com.sun.tools.jdi.JDWP$Event$Composite$Events$ClassUnload);
    descriptor: (Lcom/sun/tools/jdi/EventSetImpl;Lcom/sun/tools/jdi/JDWP$Event$Composite$Events$ClassUnload;)V
    flags: (0x0000) 
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl this
        start local 2 // com.sun.tools.jdi.JDWP$Event$Composite$Events$ClassUnload evt
         0: .line 385
            aload 0 /* this */
            aload 1
            putfield com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl.this$0:Lcom/sun/tools/jdi/EventSetImpl;
         1: .line 386
            aload 0 /* this */
            aload 1
            aload 2 /* evt */
            aload 2 /* evt */
            getfield com.sun.tools.jdi.JDWP$Event$Composite$Events$ClassUnload.requestID:I
            invokespecial com.sun.tools.jdi.EventSetImpl$EventImpl.<init>:(Lcom/sun/tools/jdi/EventSetImpl;Lcom/sun/tools/jdi/JDWP$Event$Composite$Events$EventsCommon;I)V
         2: .line 387
            aload 0 /* this */
            aload 2 /* evt */
            getfield com.sun.tools.jdi.JDWP$Event$Composite$Events$ClassUnload.signature:Ljava/lang/String;
            putfield com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl.classSignature:Ljava/lang/String;
         3: .line 388
            return
        end local 2 // com.sun.tools.jdi.JDWP$Event$Composite$Events$ClassUnload evt
        end local 0 // com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/sun/tools/jdi/EventSetImpl$ClassUnloadEventImpl;
            0    4     2   evt  Lcom/sun/tools/jdi/JDWP$Event$Composite$Events$ClassUnload;
    MethodParameters:
        Name  Flags
      this$0  final
      evt     

  public java.lang.String className();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl this
         0: .line 391
            aload 0 /* this */
            getfield com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl.classSignature:Ljava/lang/String;
            iconst_1
            aload 0 /* this */
            getfield com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl.classSignature:Ljava/lang/String;
            invokevirtual java.lang.String.length:()I
            iconst_1
            isub
            invokevirtual java.lang.String.substring:(II)Ljava/lang/String;
         1: .line 392
            bipush 47
            bipush 46
            invokevirtual java.lang.String.replace:(CC)Ljava/lang/String;
         2: .line 391
            areturn
        end local 0 // com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/sun/tools/jdi/EventSetImpl$ClassUnloadEventImpl;

  public java.lang.String classSignature();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl this
         0: .line 396
            aload 0 /* this */
            getfield com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl.classSignature:Ljava/lang/String;
            areturn
        end local 0 // com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/sun/tools/jdi/EventSetImpl$ClassUnloadEventImpl;

  java.lang.String eventName();
    descriptor: ()Ljava/lang/String;
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl this
         0: .line 400
            ldc "ClassUnloadEvent"
            areturn
        end local 0 // com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/sun/tools/jdi/EventSetImpl$ClassUnloadEventImpl;
}
SourceFile: "EventSetImpl.java"
NestHost: com.sun.tools.jdi.EventSetImpl
InnerClasses:
  ClassUnloadEventImpl = com.sun.tools.jdi.EventSetImpl$ClassUnloadEventImpl of com.sun.tools.jdi.EventSetImpl
  abstract EventImpl = com.sun.tools.jdi.EventSetImpl$EventImpl of com.sun.tools.jdi.EventSetImpl
  Event = com.sun.tools.jdi.JDWP$Event of com.sun.tools.jdi.JDWP
  Composite = com.sun.tools.jdi.JDWP$Event$Composite of com.sun.tools.jdi.JDWP$Event
  Events = com.sun.tools.jdi.JDWP$Event$Composite$Events of com.sun.tools.jdi.JDWP$Event$Composite
  ClassUnload = com.sun.tools.jdi.JDWP$Event$Composite$Events$ClassUnload of com.sun.tools.jdi.JDWP$Event$Composite$Events
  abstract EventsCommon = com.sun.tools.jdi.JDWP$Event$Composite$Events$EventsCommon of com.sun.tools.jdi.JDWP$Event$Composite$Events