import { screenchars } from "https://deno.land/x/denops_std@v6.4.0/function/mod.ts";
The result is a List of Numbers. The first number is the same
as what screenchar() returns. Further numbers are
composing characters on top of the base character.
This is mainly to be used for testing.
Returns an empty List when row or col is out of range.
Can also be used as a method:
GetRow()->screenchars(col)