public async Task <PagedResult <SearchResult> > SearchByTitle(int sourceId, string title, int sortOrder, int limit, int page)
        {
            var results = await _searcherFactory(sourceId).SearchByTitle(title, sortOrder, limit, page);

            var inLibrary = _repository.GetAllIds(sourceId)
                            .ToDictionary(s => s.SourceItemId, s => s.LibraryId);

            foreach (var result in results.Results)
            {
                if (inLibrary.TryGetValue(result.SourceItemId, out int libraryId))
                {
                    result.LibraryId = libraryId;
                }
            }

            return(results);
        }