@Override
  public PsiExpression substituteThis(PsiExpression expressionWithThis,
                                      PsiExpression howToEvaluateThis,
                                      Value howToEvaluateThisValue,
                                      StackFrameContext context)
    throws EvaluateException {
    return DebuggerTreeNodeExpression.substituteThis(expressionWithThis, howToEvaluateThis, howToEvaluateThisValue);
  }
@Override
  public PsiExpression substituteThis(PsiExpression expressionWithThis,
                                      PsiExpression howToEvaluateThis,
                                      Value howToEvaluateThisValue,
                                      StackFrameContext context)