Method preference

src/monogatari.ts:1226–1239

(key: K, value?: PlayerPreferences[K] | null)

   */
  static preference<K extends keyof PlayerPreferences>(key: K, value: PlayerPreferences[K]): PlayerPreferences[K];
  static preference<K extends keyof PlayerPreferences>(key: K, value?: PlayerPreferences[K] | null): PlayerPreferences[K] {
    if (value !== undefined && value !== null) {
      this._preferences[key] = value;
      this.Storage.update('Settings', this._preferences);

      return this._preferences[key];
    }

    if (typeof this._preferences[key] !== 'undefined') {
      return this._preferences[key];
    }

    throw new Error(`Tried to access non existent preference with name '${key}'.`);
  }

  static preferences (object: Partial<PlayerPreferences> | null = null, save = false): PlayerPreferences {
    if (object !== null) {