/// <summary>
 /// Requests a listing of assets according to the specified parameters.
 /// </summary>
 /// <param name="request">The request parameters.</param>
 /// <param name="callback">The callback to call when the request finishes.</param>
 public static void ListAssets(PolyListAssetsRequest request, ListAssetsCallback callback)
 {
     CheckInitialized();
     PolyMainInternal.Instance.ListAssets(request, callback);
 }