@empathyco/x-components
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Empathy X Components
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[Home](./index.md) > [@empathyco/x-types](./x-types.md) > [isHierarchicalFacet](./x-types.ishierarchicalfacet.md)
## isHierarchicalFacet() function
Type guard to check if a facet is an [HierarchicalFacet](./x-types.hierarchicalfacet.md)<!-- -->.
**Signature:**
```typescript
export declare function isHierarchicalFacet(facet: Facet): facet is HierarchicalFacet;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| facet | [Facet](./x-types.facet.md) | The facet to check. |
**Returns:**
facet is [HierarchicalFacet](./x-types.hierarchicalfacet.md)
True if the facet is a [HierarchicalFacet](./x-types.hierarchicalfacet.md)<!-- -->, false otherwise.