export default class Queue { done() { // } on() { // } count() { return 0; } getDelayedCount() { return 0; } add = function (data: any) { const job = this.createJob(data); if (!this.handler) { return; } this.handler(job, this.done); }; process = function (handler: any) { if (this.handler) { throw Error("Cannot define a handler more than once per Queue instance"); } this.handler = handler; }; createJob = function (data: any) { return { data, }; }; }