/// <summary>
 /// Adds a separator
 /// </summary>
 /// <param name="separator"></param>
 static public void Add(this IOperationSeparator separator)
 {
     (operationSeparator as OperationSeparatorCollection).Add(separator);
 }
 /// <summary>
 /// Adds a separator
 /// </summary>
 /// <param name="separator">The separator</param>
 public void Add(IOperationSeparator separator)
 {
     separators.Add(separator);
 }