code: public static void configure(FormatterRegistry registry) {
  		DefaultConversionService.addDefaultConverters(registry);
  		DefaultFormattingConversionService.addDefaultFormatters(registry);
  		addApplicationFormatters(registry);
  		addApplicationConverters(registry);
  	}
docs: Configure the given {@link FormatterRegistry} with formatters and converters
  appropriate for most Spring Boot applications.
  @param registry the registry of converters to add to (must also be castable to
  ConversionService, e.g. being a {@link ConfigurableConversionService})
  @throws ClassCastException if the given FormatterRegistry could not be cast to a
  ConversionService