PlaceholderDocumentOnChangedAsync - метод

protected virtual Task OnChangedAsync(
	DeferredEventArgs e = null,
	CancellationToken cancellationToken = default
)

Protected Overridable Function OnChangedAsync ( 
	Optional e As DeferredEventArgs = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As Task

protected:
virtual Task^ OnChangedAsync(
	DeferredEventArgs^ e = nullptr, 
	CancellationToken cancellationToken = CancellationToken()
)

abstract OnChangedAsync : 
        ?e : DeferredEventArgs * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _e = defaultArg e null
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task 
override OnChangedAsync : 
        ?e : DeferredEventArgs * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _e = defaultArg e null
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task