presto-main/src/main/java/io/prestosql/execution/SqlTaskExecution.java/Status/isNoMoreDriverRunners
class Status:        public synchronized boolean isNoMoreDriverRunners(Lifespan lifespan)
        {
            if (!lifespan.isTaskWide()) {
                return per(lifespan).pipelinesWithNoMoreDriverRunners == pipelineWithDriverGroupLifeCycleCount;
            }
            else {
                return per(lifespan).pipelinesWithNoMoreDriverRunners == pipelineWithTaskLifeCycleCount;
            }
        }