/// <summary>
 /// Removes a autonomous system external LSA item from this frame.
 /// </summary>
 /// <param name="lsa">The autonomous system external LSA item to remove</param>
 public void RemoveExternalItem(ASExternalItem lsa)
 {
     lItems.Remove(lsa);
 }
 /// <summary>
 /// Adds a autonomous system external LSA item to this frame.
 /// </summary>
 /// <param name="lsa">The autonomous system external LSA item to add</param>
 public void AddExternalItem(ASExternalItem lsa)
 {
     lItems.Add(lsa);
 }
 /// <summary>
 /// Returns a bool indicating whether a specific autonomous system external LSA item is contained in this frame
 /// </summary>
 /// <param name="lsa">The autonomous system external LSA item to search for</param>
 /// <returns>A bool indicating whether a specific autonomous system external LSA item is contained in this frame</returns>
 public bool ContainsExternalItem(ASExternalItem lsa)
 {
     return(lItems.Contains(lsa));
 }