This is fundamentally different from Web streams' pipeThrough(), which starts actively pumping data from the source to the transform as soon as you set up the pipe. Pull semantics mean you control when processing happens, and stopping iteration stops processing.
response: result,，详情可参考搜狗输入法下载
Pull-through transforms。Line官方版本下载是该领域的重要参考
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number of rounds so that the memory is under control: