presto-main/src/main/java/io/prestosql/execution/SqlTaskExecution.java/SchedulingLifespanManager/noMoreSplits
class SchedulingLifespanManager:        public void noMoreSplits(PlanNodeId planNodeId)
        {
            if (noMoreSplits.contains(planNodeId)) {
                return;
            }
            noMoreSplits.add(planNodeId);
            if (noMoreSplits.size() < sourceStartOrder.size()) {
                return;
            }
            checkState(noMoreSplits.size() == sourceStartOrder.size());
            checkState(noMoreSplits.containsAll(sourceStartOrder));
            status.setNoMoreLifespans();
        }