// Copy collection items to an indexed array.
ToArray()
{
  class Item
  {
    Text = "";
  }
        
  class Items
  {
    // The current items count.
    Count = 0;

    // The current #Items clone.
    ReadItems = [];

    // The private object array is part of what makes it a strongly typed
    // collection.
    #Items = [];

    // Adds the supplied object to the list.
    AddObject(item)
    {
      let retItem = null;

      // This check is part of what makes it a strongly typed collection.
      if (item instanceof Item)
      {
        retItem = item;
        this.#Items.push(item);
        this.Count = this.#Items.length;
        this.ReadItems = Array.from(this.#Items);
      }
      return retItem;
    }

    // Retrieves the object with the supplied index.
    RetrieveAtIndex(index)
    {
      let retObject = null;

      if (index >= 0
        && this.#Items.length > index)
      {
        retObject = this.#Items[index];
      }
      return retObject;
    }
  }

  let items = new Items();
  let item = new Item();
  item.Text = "First Object";
  items.AddObject(item);
  item = new Item();
  item.Text = "Second Object";
  items.AddObject(item);

  // The collection object must support Count and RetrieveAtIndex().
  const array = LJC.ToArray(items);
  if (LJC.HasElements(array))
  {
    const result = array[1].Text;

    // result:
    // Second Object
  }
}