Method push

utils/deferred.ts:122–131

(value: T)

  }

  push(value: T): void {
    // If an element has been requested while the stack was empty, indicate
    // that an element has been restored
    if (this.#queue.length > 0) {
      const d = this.#queue.shift()!;
      d.resolve(value);
    } else {
      this.#elements.push(value);
    }
  }
}