async getAll(options = {}) {
        const filter = nql();
        filter.filter = options.filter || {};
        return Promise.all(this.#store.slice().filter((item) => {
            return filter.queryJSON(this.toPrimitive(item));
        }).map((tier) => {
            return Tier.create(tier);
        }));
    }
@param {object} [options]
@param {string} [options.filter]
@returns {Promise<import('./Tier')[]>}