function beepimport { beep } from "https://deno.land/x/swissKnife@1.4/mod.ts"; beep(frequency: number, duration: number): Promise<number>Play system beep ExamplesExample 1 import * as swissKnife from "https://deno.land/x/swissKnife/mod.ts" await swissKnife.beep(500, 1000) //play 500 hz for 1 sec. Parametersfrequency: numberBeep frequency duration: numberBeep duration in milliseconds ReturnsPromise<number>the process exit code