PollingJobQueueStrategy

class PollingJobQueueStrategy extends InjectableJobQueueStrategy {    public concurrency: number | ((queueName: string) => number);    public pollInterval: number | ((queueName: string) => number);    public setRetries: (queueName: string, job: Job) => number;    public backOffStrategy?: BackoffStrategy;    public gracefulShutdownTimeout: number;    protected activeQueues = new QueueNameProcessStorage<ActiveQueue<any>>();    constructor(config?: PollingJobQueueStrategyConfig)    constructor(concurrency?: number, pollInterval?: number)    constructor(concurrencyOrConfig?: number | PollingJobQueueStrategyConfig, maybePollInterval?: number)    start(queueName: string, process: (job: Job<Data>) => Promise<any>) => ;    stop(queueName: string, process: (job: Job<Data>) => Promise<any>) => ;    cancelJob(jobId: ID) => Promise<Job | undefined>;    next(queueName: string) => Promise<Job | undefined>;    update(job: Job) => Promise<void>;    findOne(id: ID) => Promise<Job | undefined>;}