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export function cache<T extends (...args: any[]) => any>(fn: T): T {    const store = new Map<string, ReturnType<T>>();
    return ((...args) => {        const key = args.length === 1 ? args[0] : JSON.stringify(args);        const cached = store.get(key);        if (store.has(key)) {            return cached as ReturnType<T>;        }        const result = Reflect.apply(fn, undefined, args);        store.set(key, result);
        return result;    }) as T;}