private void addSource(Resolution resolution,Source source,SectionHitGroup sectionGroup,Result result,List<String> sourceList) {
        renderElements(resolution,result,sectionGroup, sourceList, source.renderers());
        /*
        for (PageElement element : source.renderers()) {
            if (element instanceof Renderer)
            if (renderer.isEmpty()) continue;
            sectionGroup.renderers().add(renderer.get(resolution.getResolution(renderer)));
        }
        */

        if (source.getUrl()==null)
            addHitsFromSource(source,sectionGroup,result,sourceList);
        else
            sectionGroup.sources().add(source); // source to be rendered by the frontend
    }
Creates the hit group corresponding to a section, drawing data from the given result
container-search/src/main/java/com/yahoo/search/pagetemplates/engine/Organizer.java