> Documentation index: https://www.gooddata.ai/docs/gooddata-ui/llms.txt lists every page of these docs as Markdown.

# isCustomWidgetBase()

- Package: [@gooddata/sdk-ui-dashboard](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-ui-dashboard/index.md)
- Kind: function
- Source: https://github.com/gooddata/gooddata-ui-sdk/blob/rel/11.64/libs/sdk-ui-dashboard/src/model/types/layoutTypes.ts

Type-guard that tests whether an object is an instance of [ICustomWidgetBase](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-ui-dashboard/sdk-ui-dashboard.icustomwidgetbase/index.md).

**Signature:**

```typescript
export declare function isCustomWidgetBase(obj: unknown): obj is ICustomWidgetBase;
```

## Parameters

| Parameter | Type | Description |
| --- | --- | --- |
| obj | unknown | object to test |

**Returns:**

obj is [ICustomWidgetBase](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-ui-dashboard/sdk-ui-dashboard.icustomwidgetbase/index.md)