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.
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BMA resident doctors committee co-chairs Dr Ross Nieuwoudt and Dr Melissa Ryan said: "We have agreed a window for negotiations, which we hope the government will use wisely.
Or the US could enter a period of lower growth, if restricting immigration takes the wind out of the economy.