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

Parameter	Type	Description
this	void
label	string \| undefined

**Returns:** (callback: () => T) => T