presto-main/src/main/java/io/prestosql/operator/JoinBridgeManager.java/TaskWideInternalJoinBridgeDataManager/getJoinBridge
class TaskWideInternalJoinBridgeDataManager:        @Override
        public T getJoinBridge(Lifespan lifespan)
        {
            checkArgument(Lifespan.taskWide().equals(lifespan));
            return joinBridge;
        }