code: public static Iterable<VcfSample> samples(final File file) throws IOException {
          checkNotNull(file);
          try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
              return samples(reader);
          }
      }
docs: Read zero or more VCF samples from the specified file.
  
  @param file file to read from, must not be null
  @return zero or more VCF samples read from the specified file
  @throws IOException if an I/O error occurs