import { settabvar } from "https://deno.land/x/denops_std@v6.4.0/function/mod.ts";
Set tab-local variable {varname} to {val} in tab page {tabnr}.
t:var
The {varname} argument is a string.
Note that autocommands are blocked, side effects may not be
triggered, e.g. when setting 'filetype'.
Note that the variable name without "t:" must be used.
Tabs are numbered starting with one.
This function is not available in the sandbox.
Can also be used as a method, the base is passed as the
third argument:
GetValue()->settabvar(tab, name)