[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FAccumulatorPool::FAccumulatorInstance](API\Plugins\MovieRenderPipelineRenderPasses\FAccumulatorPool\FAccumulatorInstance), ESPMode::ThreadSafe > BlockAndGetAccumulator_GameThread ( int32 InFrameNumber, const [FMoviePipelinePassIdentifier](API\Plugins\MovieRenderPipelineCore\FMoviePipelinePassIdentifier) & InPassIdentifier )