private void registerBuiltinSpis() {
registerServiceProvider(new JPEGImageWriterSpi());
registerServiceProvider(new JPEGImageReaderSpi());
registerServiceProvider(new PNGImageReaderSpi());
registerServiceProvider(new PNGImageWriterSpi());
registerServiceProvider(new FileIOSSpi());
registerServiceProvider(new FileIISSpi());
registerServiceProvider(new RAFIOSSpi());
registerServiceProvider(new RAFIISSpi());
registerServiceProvider(new OutputStreamIOSSpi());