method EventEmitter.prototype.addListenerimport { EventEmitter } from "https://deno.land/x/aleph@v0.2.23/events.ts"; addListener(eventName: string | symbol, listener: Function | WrappedFunction): thisAlias for emitter.on(eventName, listener). ParameterseventName: string | symbollistener: Function | WrappedFunctionReturnsthis