Fan.Sys.List.doFlatten C# (CSharp) Method

        private void doFlatten(List acc)
        {
            for (int i=0; i<m_size; ++i)
              {
            object item = m_values[i];
            if (item is List)
              ((List)item).doFlatten(acc);
            else
              acc.add(item);
              }
        }