docs: private Map<URI, Map<String, Element>> getMapMetadata(final Collection<FileInfo> fis) {
          final MapMetaReader metaReader = new MapMetaReader();
          metaReader.setLogger(logger);
          metaReader.setJob(job);
          for (final FileInfo f : fis) {
              final File mapFile = new File(job.tempDir, f.file.getPath());
              //FIXME: this reader gets the parent path of input file
              metaReader.read(mapFile);
          }
          return metaReader.getMapping();
      }