void addJFXX(JPEGBuffer buffer,JPEGImageReader reader) throws IOException {
  extSegments.add(new JFIFExtensionMarkerSegment(buffer,reader));
}

void addJFXX ( JPEGBuffer buffer , JPEGImageReader reader ) throws IOException { extSegments . add ( new JFIFExtensionMarkerSegment ( buffer , reader ) ) ; }
add an jfxx extension marker segment from the stream wrapped in the jpegbuffer to the list of extension segments .
