# Expansion for MCTag&lt;ItemDefinition&gt;

This expansion specifically targets itemTags. It adds implicit casters to IIngredient and IData, so that you can use them wherever you can use IIngredient.

 Only downside is that if you want to use Ingredient Transformers, you will need to call `asIIngredient()` first.

## Casters

| 반환 자료형                                                                 | 암묵적  |
| ---------------------------------------------------------------------- | ---- |
| [IData](/vanilla/api/data/IData)                                       | true |
| [IIngredient](/vanilla/api/ingredient/IIngredient)                     | true |
| [IIngredientWithAmount](/vanilla/api/ingredient/IIngredientWithAmount) | true |

## Methods

:::group{name=add}

Return Type: void

```zenscript
MCTag.add(items as stdlib.List<IItemStack>) as void
```

| Parameter | Type                                                                      | Description             |
| --------- | ------------------------------------------------------------------------- | ----------------------- |
| items     | stdlib.List&lt;[IItemStack](/vanilla/api/item/IItemStack)&gt; | No Description Provided |


:::

:::group{name=asIData}

Return Type: [IData](/vanilla/api/data/IData)

```zenscript
// MCTag.asIData() as IData

<tag:items:forge:gems>.asIData();
```

:::

:::group{name=asIIngredient}

Return Type: [IIngredient](/vanilla/api/ingredient/IIngredient)

```zenscript
// MCTag.asIIngredient() as IIngredient

<tag:items:forge:gems>.asIIngredient();
```

:::

:::group{name=asIIngredientWithAmount}

Return Type: [IIngredientWithAmount](/vanilla/api/ingredient/IIngredientWithAmount)

```zenscript
// MCTag.asIIngredientWithAmount() as IIngredientWithAmount

<tag:items:forge:gems>.asIIngredientWithAmount();
```

:::




반환 자료형	암묵적
반환 자료형 IData	암묵적 true
반환 자료형 IIngredient	암묵적 true
반환 자료형 IIngredientWithAmount	암묵적 true