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export class Computed<T> {    #refresh() {        this.#cached = this.#getter();
        this.#dirty = false;    }    #cached: T;    #dirty = false;    #getter: () => T;    trigger() {        this.#dirty = true;    }    get value(): T {        if (this.#dirty) {            this.#refresh();        }
        return this.#cached;    }    constructor(getter: () => T) {        this.#getter = getter;        this.#cached = this.#getter();    }}