1024     function auto(tasks, concurrency, callback) {  argument
1025         if (typeof concurrency !== 'number') {
1027             callback = concurrency;
1028             concurrency = null;
1035         if (!concurrency) {
1036             concurrency = numTasks;
1099             while(readyTasks.length && runningTasks < concurrency) {
1458     function queue(worker, concurrency, payload) {  argument
1459         if (concurrency == null) {
1460             concurrency = 1;
1462         else if(concurrency === 0) {
1564                 if (numRunning <= (q.concurrency - q.buffer) ) {
1610             concurrency,  property
1612             buffer: concurrency / 4,
1657                 while(!q.paused && numRunning < q.concurrency && q._tasks.length){
1674                     if (numRunning === q.concurrency) {
1834     function cargo$1(worker, concurrency, payload) {  argument
1835         return queue(worker, concurrency, payload);
4013     function queue$1 (worker, concurrency) {  argument
4017         }, concurrency, 1);
4160     function priorityQueue(worker, concurrency) {  argument
4162         var q = queue$1(worker, concurrency);