import { foldlevel } from "https://deno.land/x/denops_std@v3.10.1/option/mod.ts";
{not available when compiled without the |+folding| feature} Sets the fold level: Folds with a higher level will be closed. Setting this option to zero will close all folds. Higher numbers will close fewer folds. This option is set by commands like |zm|, |zM| and |zR|. See |fold-foldlevel|.