static [FPixelStreamingSetSessionDescriptionObserver](API\Plugins\PixelStreaming\FPixelStreamingSetSessionDescrip-) * Create ( const [FSuccessCallback](API\Plugins\PixelStreaming\FPixelStreamingSetSessionDescrip-\FSuccessCallback) & successCallback, const [FFailureCallback](API\Plugins\PixelStreaming\FPixelStreamingSetSessionDescrip-\FFailureCallback) & failureCallback )