class HostsFileReader {

  public void refresh() throws IOException {
    HostDetails hostDetails = current.get();
    refresh(hostDetails.includesFile, hostDetails.excludesFile);
  }

  public  HostsFileReader(String inFile,
                         String exFile);
  @Private public  HostsFileReader(String includesFile, InputStream inFileInputStream,
      String excludesFile, InputStream exFileInputStream);

}