For example, we can add a new specifier #IGNORE to prevent ID=2 row from exporting, so it' will not be generated to JSON/Text/Bin file.
The #IGNORE column cell should be parsed by strconv.ParseBool, which can accept 1, t, T, TRUE, true, True, 0, f, F, FALSE, false, False.
| ID | Name | Desc | #IGNORE | 
| map<uint32, Item> | string | string |  | 
| Item’s ID | Item’s name | Item’s desc |  | 
| 1 | Apple | A kind of delicious fruit. |  | 
| 2 | Orange | A kind of sour fruit. | true | 
| 3 | Banana | A kind of calorie-rich fruit. |  | 
{
    "itemMap": {
        "1": {
            "id": 1,
            "name": "Apple",
            "desc": "A kind of delicious fruit."
        },
        "3": {
            "id": 3,
            "name": "Banana",
            "desc": "A kind of calorie-rich fruit."
        }
    }
}