public async Task <ActionResult <Page <SourceAggregationResponse> > > GetAggregationByTitle([FromQuery] GetSourcesRequest request) { var sourcesPage = await _sourceManager.GetAggregationByTitleAsync(request.ToDomain(), Cancel); SetTotalCountHeader(sourcesPage.TotalCount); return(Ok(sourcesPage.Items.Select(x => new SourceAggregationResponse(x.Title, x.Sources)))); }