import { test_option_not_set } from "https://deno.land/x/denops_std@v6.3.0/function/vim/mod.ts";
Reset the flag that indicates option {name} was set. Thus it looks like it still has the default value. Use like this:
set ambiwidth=double
call test_option_not_set('ambiwidth')
Now the 'ambiwidth' option behaves like it was never changed, even though the value is "double". Only to be used for testing!
Can also be used as a method:
GetOptionName()->test_option_not_set()
Parameters
denops: Denops