import { foldexpr } from "https://deno.land/x/denops_std@v4.1.3/option/mod.ts";
{not available when compiled without the |+folding| or |+eval| features} The expression used for when 'foldmethod' is "expr". It is evaluated for each line to obtain its fold level. The context is set to the script where 'foldexpr' was set, script-local items can be accessed. See |fold-expr| for the usage.