import { assert_beeps } from "https://deno.land/x/denops_std@v6.3.0/function/vim/mod.ts";
Run {cmd} and add an error message to v:errors if it does
NOT produce a beep or visual bell.
Also see assert_fails(), assert_nobeep() and
assert-return.
Can also be used as a method:
GetCmd()->assert_beeps()
Parameters
denops: Denops