rc-js-util/docs/rc-js-util._debug.applylabel.md

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

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[Home](./index.md) &gt; [rc-js-util](./rc-js-util.md) &gt; [\_Debug](./rc-js-util._debug.md) &gt; [applyLabel](./rc-js-util._debug.applylabel.md)

## \_Debug.applyLabel() method

**Signature:**

```typescript
static applyLabel<T>(this: void, label: string | undefined, callback: () => T): T;
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

this


</td><td>

void


</td><td>


</td></tr>
<tr><td>

label


</td><td>

string \| undefined


</td><td>


</td></tr>
<tr><td>

callback


</td><td>

() =&gt; T


</td><td>


</td></tr>
</tbody></table>
**Returns:**

T