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url: /api/kiln/interfaces/MutParam.md
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[Kiln API](../../index.md) / [kiln](../index.md) / MutParam

# Interface: MutParam\<T>

A write declaration inside a query: `Mut(Transform)`.

## Type Parameters

| Type Parameter | Default type |
| ------ | ------ |
| `T` *extends* `Trait` | `Trait` |

## Properties

| Property | Modifier | Type |
| ------ | ------ | ------ |
|  `[$mut]` | `readonly` | `true` |
|  `trait` | `readonly` | `T` |