public void Clear()
 {
     _findResultRowsByIndex.Clear();
     FindResultRows.Clear();
     FindResultCells.Clear();
     _findCellIndex = 0;
 }
        private void AddCellToNewRow([NotNull] DataGridViewFindResultCell foundCell,
                                     int rowIndex)
        {
            var newRow = new DataGridViewFindResultRow();

            newRow.Add(foundCell);

            FindResultRows.Add(newRow);

            _findResultRowsByIndex.Add(rowIndex, newRow);
        }