ui.Thumbnail.unlisten

Deletes callbacks.

Usage	Returns
`Thumbnail.unlisten(idOrType)`

Argument	Type	Details
this: `ui.widget`	ui.Widget	The ui.Widget instance.
`idOrType`	String, optional	Either an ID returned by an onEventType() function during callback registration, an event type, or nothing. If an ID is passed, the corresponding callback is deleted. If an event type is passed, all callbacks for that type are deleted. If nothing is passed, all callbacks are deleted.

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Last updated 2021-08-30 UTC.