Here is a class:

const COMMANDS = [
    "get-myanimelist-staff-urls",
    "get-myanimelist-anime-explicit-genres",
    "get-myanimelist-anime-genres",
    "get-myanimelist-anime-themes"
    ...
];

class Shiinobi {
    constructor() {
        COMMANDS.forEach((command) => {
            this[command.replaceAll("-", "_")] = async (...args: any[]) => {
                const id = args[0];
                return await this.#spawn({ command, id: id });
            };
        });
    }
    ...

and I use this Shiinobi class like:

const shiinobi = new Shiinobi();
const res = await shiinobi.get_myanimelist_staff_urls();

this is basically a valid code since constructor creates such methods.
but there is no type for such methods:

shiinobi.get_myanimelist_staff_urls()

this code shows ts-error

I tried with typescript custom Utility type, but no hope.