docs: private void requestSegments(IntSet segments, Map<Address, IntSet> sources, Set<Address> excludedSources) {
        if (sources.isEmpty()) {
           findSources(segments, sources, excludedSources);
        }
  
        for (Map.Entry<Address, IntSet> e : sources.entrySet()) {
           addTransfer(e.getKey(), e.getValue());
        }
     }