import { setenv } from "https://deno.land/x/denops_std@v3.11.3/function/mod.ts";
Set environment variable {name} to {val}. Example: call setenv('HOME', '/home/myhome') When {val} is |v:null| the environment variable is deleted. See also |expr-env|. Can also be used as a |method|, the base is passed as the second argument: GetPath()->setenv('PATH')