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# add(_:)

Adds the specified object to the asset’s list of top-level objects.

```
func add(_ object: MDLObject)
```

## Parameters

`object`

The object to add to the asset.

## Discussion

An asset contains one or more top-level objects (instances of the [`MDLObject`](/documentation/ModelIO/MDLObject) class or one of its subclasses, such as [`MDLMesh`](/documentation/ModelIO/MDLMesh)), each of which may contain a hierarchy of child objects.

Calling this method has no effect if the object is already in the asset’s list of top-level objects.

---

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