import { fn } from "https://deno.land/x/ddc_vim@v4.3.1/deps.ts";
const { foldlevel } = fn;
The result is a Number, which is the foldlevel of line {lnum}
in the current buffer. For nested folds the deepest level is
returned. If there is no fold at line {lnum}, zero is
returned. It doesn't matter if the folds are open or closed.
When used while updating folds (from 'foldexpr') -1 is
returned for lines where folds are still to be updated and the
foldlevel is unknown. As a special case the level of the
previous line is usually available.
{lnum} is used like with getline(). Thus "." is the current
line, "'m" mark m, etc.
Can also be used as a method:
GetLnum()->foldlevel()
Parameters
denops: Denops