https://openjdk.java.net/ 
class com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl extends com.sun.tools.jdi.EventSetImpl$LocatableEventImpl implements com.sun.jdi.event.MonitorContendedEnteredEvent
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl
  super_class: com.sun.tools.jdi.EventSetImpl$LocatableEventImpl
{
  private com.sun.jdi.ObjectReference monitor;
    descriptor: Lcom/sun/jdi/ObjectReference;
    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$Events$MonitorContendedEntered);
    descriptor: (Lcom/sun/tools/jdi/EventSetImpl;Lcom/sun/tools/jdi/JDWP$Event$Composite$Events$MonitorContendedEntered;)V
    flags: (0x0000) 
    Code:
      stack=6, locals=3, args_size=3
        start local 0 // com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl this
        start local 2 // com.sun.tools.jdi.JDWP$Event$Composite$Events$MonitorContendedEntered evt
         0: .line 299
            aload 0 /* this */
            aload 1
            putfield com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl.this$0:Lcom/sun/tools/jdi/EventSetImpl;
         1: .line 300
            aload 0 /* this */
            aload 1
            aload 2 /* evt */
            aload 2 /* evt */
            getfield com.sun.tools.jdi.JDWP$Event$Composite$Events$MonitorContendedEntered.requestID:I
            aload 2 /* evt */
            getfield com.sun.tools.jdi.JDWP$Event$Composite$Events$MonitorContendedEntered.thread:Lcom/sun/tools/jdi/ThreadReferenceImpl;
            aload 2 /* evt */
            getfield com.sun.tools.jdi.JDWP$Event$Composite$Events$MonitorContendedEntered.location:Lcom/sun/jdi/Location;
            invokespecial com.sun.tools.jdi.EventSetImpl$LocatableEventImpl.<init>:(Lcom/sun/tools/jdi/EventSetImpl;Lcom/sun/tools/jdi/JDWP$Event$Composite$Events$EventsCommon;ILcom/sun/jdi/ThreadReference;Lcom/sun/jdi/Location;)V
         2: .line 297
            aload 0 /* this */
            aconst_null
            putfield com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl.monitor:Lcom/sun/jdi/ObjectReference;
         3: .line 301
            aload 0 /* this */
            aload 2 /* evt */
            getfield com.sun.tools.jdi.JDWP$Event$Composite$Events$MonitorContendedEntered.object:Lcom/sun/tools/jdi/ObjectReferenceImpl;
            putfield com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl.monitor:Lcom/sun/jdi/ObjectReference;
         4: .line 302
            return
        end local 2 // com.sun.tools.jdi.JDWP$Event$Composite$Events$MonitorContendedEntered evt
        end local 0 // com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lcom/sun/tools/jdi/EventSetImpl$MonitorContendedEnteredEventImpl;
            0    5     2   evt  Lcom/sun/tools/jdi/JDWP$Event$Composite$Events$MonitorContendedEntered;
    MethodParameters:
        Name  Flags
      this$0  final
      evt     

  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$MonitorContendedEnteredEventImpl this
         0: .line 305
            ldc "MonitorContendedEntered"
            areturn
        end local 0 // com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/sun/tools/jdi/EventSetImpl$MonitorContendedEnteredEventImpl;

  public com.sun.jdi.ObjectReference monitor();
    descriptor: ()Lcom/sun/jdi/ObjectReference;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl this
         0: .line 309
            aload 0 /* this */
            getfield com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl.monitor:Lcom/sun/jdi/ObjectReference;
            areturn
        end local 0 // com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/sun/tools/jdi/EventSetImpl$MonitorContendedEnteredEventImpl;
}
SourceFile: "EventSetImpl.java"
NestHost: com.sun.tools.jdi.EventSetImpl
InnerClasses:
  abstract LocatableEventImpl = com.sun.tools.jdi.EventSetImpl$LocatableEventImpl of com.sun.tools.jdi.EventSetImpl
  MonitorContendedEnteredEventImpl = com.sun.tools.jdi.EventSetImpl$MonitorContendedEnteredEventImpl 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$Composite
  abstract EventsCommon = com.sun.tools.jdi.JDWP$Event$Composite$Events$EventsCommon of com.sun.tools.jdi.JDWP$Event$Composite$Events
  MonitorContendedEntered = com.sun.tools.jdi.JDWP$Event$Composite$Events$MonitorContendedEntered of com.sun.tools.jdi.JDWP$Event$Composite$Events