import { strgetchar } from "https://deno.land/x/denops_std@v6.4.0/function/mod.ts";
Get a Number corresponding to the character at {index} in
{str}. This uses a zero-based character index, not a byte
index. Composing characters are considered separate
characters here. Use nr2char() to convert the Number to a
String.
Returns -1 if {index} is invalid.
Also see strcharpart() and strchars().
Can also be used as a method:
GetText()->strgetchar(5)