Method preload

packages/db/src/collection/index.ts:473–475

* Preload the collection data by starting sync if not already started * Multiple concurrent calls will share the same promise

()

   * Multiple concurrent calls will share the same promise
   */
  public preload(): Promise<void> {
    return this._sync.preload()
  }

  /**
   * Get the current value for a key (virtual derived state)