[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [\_Debug](./rc-js-util._debug.md) > [applyLabel](./rc-js-util._debug.applylabel.md) ## \_Debug.applyLabel() method **Signature:** ```typescript static applyLabel(this: void, label: string | undefined, callback: () => T): T; ``` ## Parameters

Parameter	Type	Description
this	void
label	string \| undefined
callback	() => T

**Returns:** T