akes a <a href="-stoppable-flow-collector/index.html">StoppableFlowCollector</a> and defines the logic     for collecting and emitting elements. To stop the collection early, call the halt method     on the <a href="-stoppable-flow-collector/index.html">StoppableFlowCollector</a> with a message describing the reason for stopping.</p></div></div></div></div></div></div></div>
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