code: public static void addApplicationConverters(ConverterRegistry registry) {
  		addDelimitedStringConverters(registry);
  		registry.addConverter(new StringToDurationConverter());
  		registry.addConverter(new DurationToStringConverter());
  		registry.addConverter(new NumberToDurationConverter());
  		registry.addConverter(new DurationToNumberConverter());
  		registry.addConverter(new StringToDataSizeConverter());
  		registry.addConverter(new NumberToDataSizeConverter());
  		registry.addConverterFactory(new StringToEnumIgnoringCaseConverterFactory());
  	}
docs: Add converters useful 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 ConverterRegistry could not be cast to a
  ConversionService