docs: private void registerJsonFormatInterceptor() {		
  		RestTemplate restTemplate = getRestTemplate();
  		if (interceptorsSupported) {
  			List<ClientHttpRequestInterceptor> interceptors = restTemplate.getInterceptors();
  			interceptors.add(new JsonFormatInterceptor());
  		} else {
  			// for Spring 3.0.x where interceptors aren't supported
  			ClientHttpRequestFactory originalRequestFactory = restTemplate.getRequestFactory();
  			JsonFormatHeaderRequestFactory newRequestFactory = new JsonFormatHeaderRequestFactory(originalRequestFactory);
  			restTemplate.setRequestFactory(newRequestFactory);
  		}
  	}