@Override
  public Object computeConstantExpression(PsiElement expression, boolean throwExceptionOnOverflow) {
    return expression instanceof PsiExpression ? JavaConstantExpressionEvaluator.computeConstantExpression((PsiExpression)expression, throwExceptionOnOverflow) : null;
  }
@Override
  public Object computeConstantExpression(PsiElement expression, boolean throwExceptionOnOverflow)