## normalizeErrorString() function
Normalizes an error object into a displayable error string.

**Signature:**

```typescript
export declare function normalizeErrorString(error: unknown): string;
```

## Parameters

| Parameter | Type | Description |
| --- | --- | --- |
| error | unknown | The error value which could be a string, Error, OperationOutcome, or other unknown type. |

**Returns:**

string

A display string for the error.