Cenários de utilização:

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A) Com token + If-None-Match + quer 304

<HttpPost>
<ActionAuthentication>
Public Async Function ConfigLoadInfoDelta(req As WCFServiceEP.ConfigLoadInfoRequest) _
    As Task(Of WCFServiceEP.DefaultResponseOfConfigLoadInfoResponse)

    Dim defaultFactory As Func(Of WCFServiceEP.DefaultResponseOfConfigLoadInfoResponse) =
        Function()
            Return New WCFServiceEP.DefaultResponseOfConfigLoadInfoResponse With {
                .value = Nothing,
                .result = New WCFServiceEP.Result With {.code = -1}
            }
        End Function

    Try
        Dim opt = RSEndpointExecutionOptions.WithHeaders(
            tokenSID:=GetTokenSID(),
            clientIfNoneMatch:=GetClientIfNoneMatch(),
            handle304:=True
        )

        Return Await RSEndpointWebApiHelper.ExecuteAsync(
            action:=Function() EP_WCFService.service.ConfigLoadInfoAsync(req),
            defaultValueFactory:=defaultFactory,
            options:=opt
        ).ConfigureAwait(False)

    Catch ex304 As HttpResponseException
        Throw

    Catch ex As Exception
        Dim noTask = Common.FixErrors.LogErrorAsync(MethodBase.GetCurrentMethod, ex).ConfigureAwait(False)
        Return defaultFactory()
    End Try
End Function

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B) Chamada “anônima” (sem token/sem If-None-Match), mas ainda quer injetar headers

Dim opt = RSEndpointExecutionOptions.WithHeaders(handle304:=False) ' TokenSID/IfNoneMatch = Nothing

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C) Sem header context e sem 304 (a maioria)

Dim opt = RSEndpointExecutionOptions.None()
' ou nem passe options

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