/// <summary>Gets subcategories titles for this PageList from specified wiki category page,
 /// excluding other pages. Use FillFromCategory function to get other pages.</summary>
 /// <param name="categoryName">Category name, with or without prefix.</param>
 public void FillSubsFromCategory(string categoryName)
 {
     int count = pages.Count;
     PageList pl = new PageList(site);
     pl.FillAllFromCategory(categoryName);
     pl.FilterNamespaces(new int[] {14});
     pages.AddRange(pl.pages);
     if (pages.Count != count)
         Bot.LogEvent(Bot.Msg("PageList filled with {0} subcategory page titles, " +
             "found in \"{1}\" category."), (pages.Count - count).ToString(), categoryName);
     else
         Console.Error.WriteLine(
             Bot.Msg("Nothing was found in \"{0}\" category."), categoryName);
 }