protected ObjectReference getThisObject(SuspendContextImpl context, LocatableEvent event) throws EvaluateException {
    ThreadReferenceProxyImpl thread = context.getThread();
    if (thread != null) {
      StackFrameProxyImpl stackFrameProxy = context.getFrameProxy();
      if (stackFrameProxy != null) {
        return stackFrameProxy.thisObject();
      }
    }
    return null;
  }
protected ObjectReference getThisObject(SuspendContextImpl context, LocatableEvent event)