import { previewpopup } from "https://deno.land/x/denops_std@v3.9.0/option/vim/mod.ts";
{not available when compiled without the |+textprop| or |+quickfix| feature} When not empty a popup window is used for commands that would open a preview window. See |preview-popup|. Not used for the insert completion info, add "popup" to 'completeopt' for that.