private static @Nullable PsiReferenceExpression getIncrementOrDecrementOperand(@Nullable IElementType tokenType, @Nullable PsiExpression operand) {
    final PsiExpression bareOperand = PsiUtil.skipParenthesizedExprDown(operand);
    if (bareOperand instanceof PsiReferenceExpression &&
        (JavaTokenType.PLUSPLUS.equals(tokenType) || JavaTokenType.MINUSMINUS.equals(tokenType))) {
      return (PsiReferenceExpression)bareOperand;
    }
    return null;
  }
private static @Nullable PsiReferenceExpression getIncrementOrDecrementOperand(@Nullable IElementType tokenType, @Nullable PsiExpression operand)