import { op } from "https://deno.land/x/ddc_vim@v0.17.0/deps.ts";
const { previewwindow } = op;
{not available when compiled without the |+quickfix| feature} Identifies the preview window. Only one window can have this option set. It's normally not set directly, but by using one of the commands |:ptag|, |:pedit|, etc.