new ReaderSuffixFilter(fileSuffix));
new ReaderSuffixFilter(fileSuffix), fileSuffix);
  public static Iterator getImageReadersBySuffix(String fileSuffix)  {    if (fileSuffix == null)      throw new IllegalArgumentException("formatName may not be null");        return getReadersByFilter(ImageReaderSpi.class,                              new ReaderSuffixFilter(fileSuffix));  }