set _numConcurrentWorkers(numConcurrentWorkers) {
if (numConcurrentWorkers > 10) {
EventEmitter.defaultMaxListeners = numConcurrentWorkers + 1;
set _numConcurrentWorkers(numConcurrentWorkers) {
if (numConcurrentWorkers > 10) {
EventEmitter.defaultMaxListeners = numConcurrentWorkers + 1;