## isPeriod() function

Determines if the input is a Period object. This is heuristic based, as we do not have strong typing at runtime.

**Signature:**

```typescript
export declare function isPeriod(input: unknown): input is Period;
```

## Parameters

| Parameter | Type     | Description           |
|-----------|----------|-----------------------|
| input     | unknown  | The input value.      |

**Returns:**

input is Period

True if the input is a period.