RichTextBoxAttachmentHelperProcessingFileAttachmentAsync - метод

Public Shared Function ProcessingFileAttachmentAsync ( 
	fileId As Guid,
	getFileContentFromCardAsync As Func(Of Guid, CancellationToken, Task(Of ( As List(Of String), validationResult As IValidationResultBuilder))),
	openOrSaveFileAction As Func(Of String, CancellationToken, Task),
	Optional cancellationToken As CancellationToken = Nothing
) As Task

public:
static Task^ ProcessingFileAttachmentAsync(
	Guid fileId, 
	Func<Guid, CancellationToken, Task<ValueTuple<List<String^>^, IValidationResultBuilder^>>^>^ getFileContentFromCardAsync, 
	Func<String^, CancellationToken, Task^>^ openOrSaveFileAction, 
	CancellationToken cancellationToken = CancellationToken()
)

static member ProcessingFileAttachmentAsync : 
        fileId : Guid * 
        getFileContentFromCardAsync : Func<Guid, CancellationToken, Task<ValueTuple<List<string>, IValidationResultBuilder>>> * 
        openOrSaveFileAction : Func<string, CancellationToken, Task> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task