import { fn } from "https://deno.land/x/denops_lsputil@v0.9.4/deps.ts";
const { tolower } = fn;
The result is a copy of the String given, with all uppercase
characters turned into lowercase (just like applying gu to
the string). Returns an empty string on error.
Can also be used as a method:
GetText()->tolower()
Parameters
denops: Denops