code: protected Map<String, Object> extractContent(PropertySource<?> propertySource) {
  		return new Binder(ConfigurationPropertySources.from(propertySource))
  				.bind("", STRING_OBJECT_MAP).orElseGet(LinkedHashMap::new);
  	}
docs: Extract the raw content based on the specified {@link PropertySource}.
  @param propertySource the property source to use
  @return the raw content