method EventEmitter.prototype.onceimport { EventEmitter } from "https://deno.land/x/eventemitter@1.2.4/mod.ts"; once<K extends keyof E>(event: K, listener: E[K]): thisListen for a typed event once. Listen for a typed event once. Type ParametersK extends keyof EParametersevent: KThe typed event name to listen for. listener: E[K]The typed listener function. Returnsthis