/// <summary>Add a comment to the comment set.</summary>
/// <remarks>Add a comment to the comment set.</remarks>
/// <param name="comment">the comment node.</param>
/// <exception cref="System.ArgumentException">
/// if comment is
/// <code>null</code>
/// </exception>
public virtual void AddComment(Comment comment)
{
AssertNotNull(comment);
if (comments == null)
{
comments = new TreeSet<Comment>(new AstNode.PositionComparator());
}
comments.Add(comment);
comment.SetParent(this);
}
