code: protected void addDocIterators(Collection<Iterator<Document>> docIters,
                                     String[] fileNames) throws IOException {
          // All the documents are listed in one file, with one document per line
          for (String s : fileNames)
              docIters.add(new DependencyFileDocumentIterator(s));
      }
docs: Adds {@link DependencyFileDocumentIterator}s for each file name provided.