import { modelineexpr } from "https://deno.land/x/denops_std@v3.8.2/option/mod.ts";
When on allow some options that are an expression to be set in the modeline. Check the option for whether it is affected by 'modelineexpr'. Also see |modeline|. This option cannot be set from a |modeline| or in the |sandbox|, for security reasons.