private void setupRle(IDataBindingSource src, RepositoryItemCheckedComboBoxEdit rle, string fn)
        {
            //rle.DisplayMember = DisplayMember;
            //rle.ValueMember = ValueMember;
            GetFieldOptionsListEventData qd = new GetFieldOptionsListEventData {
                Data = null, FieldName = fn, DataBindingSource = src
            };

            src.EditorsHost.onGetOptionsList(this, qd);
            if (qd.Data != null)
            {
                CheckedListBoxItemCollection coll = rle.Items;
                coll.BeginUpdate();
                try
                {
                    qd.Data.Cast <object>().ToList().ForEach(o => coll.Add(o));
                }
                finally
                {
                    coll.EndUpdate();
                }
            }
        }