IPreviewHandlerProxyCloseAsync - метод

ValueTask CloseAsync(
	CancellationToken cancellationToken = default
)

Function CloseAsync ( 
	Optional cancellationToken As CancellationToken = Nothing
) As ValueTask

ValueTask CloseAsync(
	CancellationToken cancellationToken = CancellationToken()
)

abstract CloseAsync : 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> ValueTask