GitUI.RevisionGrid.SearchInReverseOrder C# (CSharp) Метод

        private int? SearchInReverseOrder(int startIndex, string searchString)
        {
            // Check for out of bounds roll over if required
            int index;
            if (startIndex < 0 || startIndex >= Revisions.RowCount)
                startIndex = Revisions.RowCount - 1;

            for (index = startIndex; index >= 0; --index)
            {
                if (GetRevision(index).MatchesSearchString(searchString))
                    return index;
            }

            // We didn't find it so start searching from the bottom
            for (index = Revisions.RowCount - 1; index > startIndex; --index)
            {
                if (GetRevision(index).MatchesSearchString(searchString))
                    return index;
            }

            return null;
        }