code: public CloseableIterator<CaptureSearchResult> getPrefixReverseIterator(
  			String prefix) throws ResourceIndexNotAvailableException {
  
  		Comparator<CaptureSearchResult> comparator = new SearchResultComparator(true);
  		CompositeSortedIterator<CaptureSearchResult> itr = 
  			new CompositeSortedIterator<CaptureSearchResult>(comparator);
  		for (int i = 0; i < sources.size(); i++) {
  			itr.addComponent(sources.get(i).getPrefixReverseIterator(prefix));
  		}
  		return itr;
  	}
docs: /*
  (non-Javadoc)
  
  @see org.archive.wayback.resourceindex.SearchResultSource#getPrefixReverseIterator(java.lang.String)