PreviewServiceClientDoPreviewAsync - метод

public ValueTask<(bool result, string exceptionText)> DoPreviewAsync(
	CancellationToken cancellationToken = default
)

Public Function DoPreviewAsync ( 
	Optional cancellationToken As CancellationToken = Nothing
) As ValueTask(Of (result As Boolean, exceptionText As String))

public:
virtual ValueTask<ValueTuple<bool, String^>> DoPreviewAsync(
	CancellationToken cancellationToken = CancellationToken()
) sealed

abstract DoPreviewAsync : 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> ValueTask<ValueTuple<bool, string>> 
override DoPreviewAsync : 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> ValueTask<ValueTuple<bool, string>>