Events that can currently be listened to:
'ready': Emitted when the number of workers created in the pool has reached the minimum size expected and are ready.'busy': Emitted when the number of workers created in the pool has reached the maximum size expected and are executing at least one task.'busy': Emitted when the number of workers created in the pool has reached the maximum size expected and are executing concurrently their tasks quota.'full': Emitted when the pool is dynamic and the number of workers created has reached the maximum size expected.'destroy': Emitted when the pool is destroyed.'error': Emitted when an uncaught error occurs.Protected Readonly fileProtected Optional Readonly maxProtected Readonly numberProtected Readonly optsProtected promiseProtected workerReadonly Internal workerProtected fullProtected maxProtected minPrivate readyProtected typePrivate utilizationProtected workerProtected afterProtected beforeProtected checkProtected createProtected createProtected createProtected destroyProtected flushProtected getProtected internalProtected isProtected registerProtected sendProtected sendProtected sendProtected setupProtected worker