IPreviewHandlerProxyDoPreviewAsync - метод

ValueTask DoPreviewAsync(
	CancellationToken cancellationToken = default
)

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

ValueTask DoPreviewAsync(
	CancellationToken cancellationToken = CancellationToken()
)

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