import { fn } from "https://deno.land/x/denops_lsputil@v0.9.4/deps.ts";
const { setenv } = fn;
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')